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A High-Performance Organic Photovoltaic System with Versatile solution processability

ADVANCED MATERIALS 2024年第35期36卷 e2406329页

作者： Shao, Yiming Gao, Yuan Sun, Rui Yang, Xinrong Zhang, Meimei Liu, Shanshan Min, Jie Wuhan Univ Inst Adv Studies Wuhan 430072 Peoples R China

Recently developed organic photovoltaic (OPV) materials have simultaneously closed the gaps in efficiency, stability, and cost for single-junction devices. Nonetheless, the developed OPV materials still pose big challenges in meeting the requirements for practical applications, especially regarding the prevalent issues of solution processability. Herein, a highly efficient polymer donor, named DP3, incorporating an electron-rich benzo[1,2-b:4,5-b ']dithiophene unit as well as two similar and simple acceptor units is presented. Its primary objective is to enhance the interchain and/or intrachain interactions and ultimately fine-tune bulk-heterojunction microstructure. The DP3:L8-BO system demonstrates the highest power conversion efficiency (PCE) of 19.12%. This system also exhibits high-performance devices with over 18% efficiencies for five batches with various molecular weights (23.6-80.8 KDa), six different blend thicknesses (95-308 nm), differenced coating speeds (3.0-29.1 m min-1), with promising PCEs of 18.65% and 15.53% for toluene-processed small-area (0.029 cm2) cells and large-area (15.40 cm2) modules, thereby demonstrating versatile solution processability of the designed DP3:L8-BO system that is a strong candidate for commercial applications. By enhancing the aggregation characteristics and crystallinity of the polymer donor through a terpolymerization strategy, an organic photovoltaic system with synergistic improvements in the device performance and versatile solution processability is developed. image

关键词： batch-to-batch insensitivity high-speed coating key performance indexes random polymerization strategy solution processability

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Side-group engineering of semiconducting naphthalene diimide derivatives with high solution-processability and high thermal stability

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ORGANIC ELECTRONICS 2022年 100卷 106348-106348页

作者： Lee, Jong Bum Oh, Byeong M. Lee, Yun-Sang Yoon, Woojin Yun, Hoseop Kim, Dongwook Kim, Jong H. Kwon, O. -Pil Ajou Univ Dept Mol Sci & Technol Suwon 443749 South Korea Ajou Univ Dept Chem Suwon 443749 South Korea Ajou Univ Dept Energy Syst Res Suwon 443749 South Korea Kyonggi Univ Dept Chem San 94-6 Suwonsi 443760 Gyeonggi South Korea

A series of new naphthalene diimide (NDI) semiconducting derivatives with different N-phenyl bicyclic side groups were rationally designed and synthesized in this study. The solubility of the orthogonal-shaped NDI derivatives with 5-tetralinyl and 4-indanyl side groups was found to be up to two orders of magnitude higher than that of the linear-shaped NDI derivatives with 6-tetralinyl and 5-indanyl side groups. The orthogonal-shaped NDI derivative with a 5-tetralinyl side group exhibited excellent solution processability due to its high solubility (e.g., 4 g/100 g dichlorobenzene), high thermal stability (e.g., lowest phase transition temperature of 380 degrees C), and high vertical carrier mobility (e.g., space-current-limited-current electron mobility of 7 x 10(-5) cm(2)/V.s). Therefore, the introduction of N-phenyl bicyclic side groups on organic semiconductors was confirmed to be a highly promising design strategy for achieving the desired physical properties.

关键词： Side-chain engineering Naphthalene diimide Organic semiconductors solution processability

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Symmetric and asymmetric spiro-type colorless poly(ester imide)s with low coefficients of thermal expansion, high glass transition temperatures, and excellent solution-processability

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POLYMER 2019年 169卷 167-184页

作者： Hasegawa, Masatoshi Takahashi, Shinya Tsukuda, Soichi Hirai, Tomoki Ishii, Junichi Yamashina, Yukari Kawamura, Yoshinori Toho Univ Dept Chem Fac Sci 2-2-1 Miyama Funabashi Chiba 2748510 Japan Taoka Chem Co Ltd Yodogawa Ku 4-2-11 Nishimikuni Osaka 5320006 Japan

In this work, we present several new poly(ester imide)s (PEsIs) with low coefficients of thermal expansion (CTE), excellent optical transparency, very high heat resistance (T-g), film ductility, and solution-processability. Symmetric and asymmetric spiro-type tetracarboxylic dianhydrides containing ester linkages (TA-s-Spiro and TA-a-Spiro) and diamines (AB-s-Spiro and AB-a-Spiro) were synthesized using xanthene-based isomeric bi-sphenols with a fluorenyl side group. The chemically imidized PEsIs were highly soluble in various common solvents including less polar non-amide solvents, and yielded stable solutions with high solid contents. The properties of the spiro-type PEsIs were systematically investigated and compared with those of the cardo-type counterparts. A PEsI derived from 1,2,3,4-cyclobutanetetracarboxylic dianhydride (CBDA), AB-a-Spiro, and 2,2'-bis( trifluoromethyl) benzidine (TFMB) achieved outstanding combined properties, i.e., a very low CTE (10.5 ppm K-1), excellent optical transparency (YI = 3.4, T-400 = 80.8%), a very high T-g (351 degrees C) and solution-processability. Thus, the PEsIs are promising candidates as novel plastic substrates for use in image display devices. The isomer effects on the properties were also investigated and a possible mechanism for these effects is proposed.

关键词： Poly(ester imide)s Spiro structure Cardo structure Optical transparency Coefficient of thermal expansion (CTE) solution processability Heat-resistant plastic substrates

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Alcohol-Soluble Quantum Dots: Enhanced solution processability and Charge Injection for Electroluminescence Devices

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IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 2017年第5期23卷

作者： Chang, Shuai Zhang, Xin Wang, Ziwei Han, Dengbao Tang, Jialun Bai, Zelong Zhong, Haizheng Beijing Inst Technol Sch Mat Sci & Engn Beijing 100081 Peoples R China

General and versatile ligand exchange routes are developed for converting nonpolar solvent soluble quantum dots to alcohol-soluble. Through ligand exchange, long-chain methyl-terminated oleylamine on quantum dots' surface can be substituted by short-chain hydroxyl-terminated 6-mercaptohexanol, enabling their dispersibility in polar organic solvents including methanol, ethanol, isopropanol, and dimethylformamide. The resulted alcohol-soluble quantum dots maintained their optical properties and perfectly fit the requirements for solution-processed electroluminescence devices. Light emitting diode based on the alcohol-soluble quantum dots eclipsed their counterparts made from nonpolar solvent soluble quantum dots. The improvement of device performance is ascribed to decreased energy barriers and increased charge injection rate between charge transport layer and the emitting layer. The hydroxyl-terminated quantum dots provide a new materials platform for the design of highly efficient quantum dot light emitting diodes, and also enable an alternative route to achieve RGB display devices.

关键词： Alcohol-soluble quantum dot light-emitting diodes solution processability charge injection

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Highly efficient solution-processed organic photovoltaics enabled by improving packing behavior of organic semiconductors

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Science China Chemistry 2024年第3期67卷 890-897页

作者： Xinyue Cui Hongxiang Li Hao Lu Yuqiang Liu Guangliu Ran Rui Liu Huarui Zhang Xueqing Ma Dawei Li Yi Lin Jifa Yu Wenkai Zhang Lei Cai Yahui Liu Pei Cheng Andong Zhang Zaifei Ma Guanghao Lu Zhishan Bo College of Textiles and Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao 266071China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing 100875China Shandong Province Key Laboratory of Medical Physics and Image Processing Technology School of Physics and ElectronicsShandong Normal UniversityJinan 250014China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an 710054China

solution processability is a unique property of organic semiconductors. The compact and regular π-π stacking between molecules is paramount in the performance of organic optoelectronic devices. However, it is still a challenge to improve their stacking quality without sacrificing the solution-processability from the aspect of materials design. Here, delicately engineered additives are presented to promote the formation of ordered aggregation of conjugated molecules by regulating their nucleation and growth dynamics. Intriguingly, the long-chain BTP-eC9-4F molecules can realize ordered aggregation comparable to short-chain ones without sacrificing processability. The domain size of BTP-eC9-4F aggregation is enlarged from 24.2 to 32.2 nm in blend *** exciton diffusion and charge transport become faster, contributing to the suppression of recombination losses. As a result, a power conversion efficiency of 19.2% is achieved in D18:BTP-eC9-4F based organic photovoltaics. Our findings demonstrate a facile strategy to improve the packing quality of solution-processed organic semiconductors for high-efficiency photovoltaics and beyond photovoltaics.

关键词： organic semiconductor organic photovoltaic charge transport solution processability

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Efficient Triplet Harvesting via Hot Exciton Utilization in solution Processed OLEDs Employing Tetraphenyl Buta-1,3-Diene Based AIE Emitters

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ADVANCED OPTICAL MATERIALS 2025年第5期13卷

作者： Datta, Ayan Mukherjee, Susmita Pal, Prasanta Pal, Arun K. Perumal, Ajay Malik, Sudip Indian Assoc Cultivat Sci Sch Appl & Interdisciplinary Sci SAIS 2A & 2B Raja S C Mullick Rd Kolkata 700032 West Bengal India Indian Inst Sci Educ & Res IISER Dept Phys Sci Funct NANO & Optoelect Lab FNOL Berhampur 760010 Odisha India Indian Assoc Cultivat Sci Sch Chem Sci SCS 2A & 2B Raja S C Mullick Rd Kolkata 700032 West Bengal India

High photoluminescence quantum yield (PLQY) especially in solid-state together with harvesting radiative triplet excitons are essential to achieve efficient organic light-emitting diodes (OLEDs). Herein, the aggregation induced emission (AIE) active tetraphenyl buta-1,3-diene (TPB) moiety has been employed and tactfully modified to obtain orthogonally oriented donor-acceptor (D-A-pi-A-D) type derivatives (namely, TPB-CHO-TPA and TPB-CN-TPA) which possess additionally the hybridized local and charge transfer (HLCT) type excited-state. Moreover, computational studies have revealed the possibility of triplet harvesting through hot exciton mechanism in these designed emitters. These key features along with excellent solubility in most of the organic solvents have encouraged to utilize these as light emitting materials for solution processed non-doped and doped OLED devices. The optimal OLED device using TPB-CHO-TPA exhibits yellow light emission (ELmax = 572 nm and CIEx,y = 0.48, 0.51) having maximum external quantum efficiency (EQEmax) of 7.6% with power and current efficiency of 6.1 lm W-1 and 8.9 cd A-1 where the calculated exciton utilization efficiency (EUE) approaches to 97%, indicating efficient triplet harvesting in electroluminescence process. This work signifies a novel design strategy for AIE-based HLCT type emitters having efficient hot exciton utilization which can pave the way for future development of TPB based highly efficient OLED devices. Tetraphenylbuta-1,3-diene based new AIEgens (TPB-CN-TPA and TPB-CHO-TPA) with orthogonal orientation of donors and acceptors are developed. Their key features such as hybridized local and charge transfer (HLCT) state, triplet harvesting capacity via hot exciton utilization, and excellent solubility in common organic solvents have assisted in achieving outstanding electroluminescence performance in the solution-processed organic light-emitting diodes (OLEDs). image

关键词： aggregation induced emission hot exciton utilization hybridized local and charge transfer state organic light emitting diode solution processability

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solution Processable Metal-Organic Frameworks: Synthesis Strategy and Applications

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ADVANCED MATERIALS 2025年第1期37卷 e2412708页

作者： Zhang, Wanglin Wu, Xuanhao Peng, Xiaoyan Tian, Yefei Yuan, Hongye Xi An Jiao Tong Univ Sch Mat Sci & Engn Shaanxi Int Res Ctr Soft Matter State Key Lab Mech Behav Mat Xian 710049 Peoples R China Changan Univ Sch Mat Sci & Engn 75 Changan Middle Rd Xian 710064 Shaanxi Peoples R China

Metal-organic frameworks (MOFs), constructed by inorganic secondary building units with organic linkers via reticular chemistry, inherently suffer from poor solution processability due to their insoluble nature, resulting from their extensive crystalline networks and structural rigidity. The ubiquitous occurrence of precipitation and agglomeration of MOFs upon formation poses a significant obstacle to the scale-up production of MOF-based monolith, aerogels, membranes, and electronic devices, thus restricting their practical applications in various scenarios. To address the previously mentioned challenge, significant strides have been achieved over the past decade in the development of various strategies aimed at preparing solution-processable MOF systems. In this review, the latest advance in the synthetic strategies for the construction of solution-processable MOFs, including direct dispersion in ionic liquids, surface modification, controllable calcination, and bottom-up synthesis, is comprehensively summarized. The respective advantages and disadvantages of each method are discussed. Additionally, the intriguing applications of solution-processable MOF systems in the fields of liquid adsorbent, molecular capture, sensing, and separation are systematically discussed. Finally, the challenges and opportunities about the continued advancement of solution-processable MOFs and their potential applications are outlooked.

关键词： controllable calcination direct dispersion direct synthesis large-area films metal-organic frameworks solution processability surface modification

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Stabilizing TiO2/CsPbI2Br Perovskite Buried Interface for All-Inorganic Perovskite toward Highly Efficient Photodetectors

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ADVANCED MATERIALS INTERFACES 2025年第0期

作者： Shah, Shruti Ladhane, Somnath Shinde, Pratibha Doiphode, Vidya Kale, Dhanashri Rahane, Swati Thombare, Jyoti Ingole, Manasi Hase, Yogesh Waghmare, Ashish Prasad, Mohit Patole, Shashikant P. Jadkar, Sandesh Savitribai Phule Pune Univ Ctr Energy Studies Pune 411007 India PCCOE Dept Appl Sci & Humanities Pune 411004 India Khalifa Univ Sci & Technol Dept Phys Abu Dhabi 127788 U Arab Emirates Savitribai Phule Pune Univ Dept Phys Pune 411007 India

Inorganic perovskites hold immense promise for optoelectronic applications, but their performance is often hindered by defects and trap states introduced during solution-based processing. This study demonstrates a facile approach to mitigate these challenges by employing in situ polyvinyl pyrrolidone (PVP) passivation during the hydrothermal growth of TiO2 nanorods, improving the interface with CsPbI2Br (CPIB) perovskite. X-ray diffraction analysis confirms the formation of TiO2 nanorods with a crystallite size of approximate to 49 nm and low microstrain. The PVP passivation layer effectively suppresses nonradiative recombination, leading to a significant enhancement in photoluminescence intensity. Photodetectors fabricated using PVP-treated TiO2/CPIB interfaces exhibit significantly faster response times, with a rise time of approximate to 11 ms and a decay time of approximate to 0.3 ms, compared to devices without PVP. This results in an impressive photoresponsivity of approximate to 0.9 mA W-1 and a detectivity of approximate to 10(1)(2) 10(12) Jones. This work demonstrates a simple yet effective strategy for improving the performance of all-inorganic perovskite-based optoelectronic devices, paving the way for their future applications in high-performance photodetectors, solar cells, and other optoelectronic devices.

关键词： buried interface passivation photodetector solution processability treated

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Crystalline Porous Organic Frameworks Based on Multiple Dynamic Linkages

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2024年第28期63卷 e202405027-e202405027页

作者： Liu, Bo Guo, Panyue Guan, Xinyu Tian, Xuexue Du, Fei Xie, Weiqing Jiang, Hai-Long Northwest A&F Univ Coll Chem & Pharm Yangling 712100 Peoples R China Univ Sci & Technol China Hefei Natl Res Ctr Phys Sci Microscale Dept Chem Hefei 230026 Anhui Peoples R China Zhejiang Normal Univ Hangzhou Inst Adv Studies Hangzhou 310000 Zhejiang Peoples R China

A novel class of crystalline porous materials has been developed utilizing multilevel dynamic linkages, including covalent B-O, dative B <- N and hydrogen bonds. Typically, boronic acids undergo in situ condensation to afford B3O3-based units, which further extend to molecular complexes or chains via B <- N bonds. The obtained superstructures are subsequently interconnected via hydrogen bonds and pi-pi interactions, producing crystalline porous organic frameworks (CPOFs). The CPOFs display excellent solution processability, allowing dissolution and subsequent crystallization to their original structures, independent of recrystallization conditions, possibly due to the diverse bond energies of the involved interactions. Significantly, the CPOFs can be synthesized on a gram-scale using cost-effective monomers. In addition, the numerous acidic sites endow the CPOFs with high NH3 capacity, surpassing most porous organic materials and commercial materials. A novel class of crystalline porous organic frameworks (CPOFs) are prepared based on covalent B-O, dative B <- N and hydrogen bonds. Furthermore, gram-scale production can be achieved at low cost, alongside excellent solution processibility, paving the way to diverse applications. Remarkably, the CPOFs exhibit exceptionally high NH3 uptake capacities, indicating their great potential toward NH3 capture. image

关键词： crystalline porous materials microporous materials solution processability dynamic bonds gas adsorption

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Polymer Passivated All Inorganic Micro-Structured CsPbIxBry Perovskite Toward Highly Efficient Photodetectors

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ADVANCED ELECTRONIC MATERIALS 2024年第9期10卷

作者： Shah, Shruti Punde, Ashvini Kale, Dhanashri Hase, Yogesh Ladhane, Somnath Rahane, Swati Doiphode, Vidya Shinde, Pratibha Waghmare, Ashish Bade, Bharat Rondiya, Sachin Prasad, Mohit Patole, Shashikant P. Jadkar, Sandesh Savitribai Phule Pune Univ Dept Phys Pune 411007 India Indian Inst Sci Dept Mat Engn Bangaluru 560012 India Pimpri Chinchwad Coll Engn PCCOE Dept Appl Sci & Humanities Pune 411004 India Khalifa Univ Sci & Technol Dept Phys Abu Dhabi 127788 U Arab Emirates

solution-processed inorganic perovskites cause chemical and structural defects unfavorable for photodetector application. Using a binary solvent, defects inCsPbI(x)Br(y) (CPIB) perovskite are passivated with poly 4-vinylpyridine (PVP) and Poly methyl methacrylate (PMMA) polymers. X-ray photoelectron spectroscopy and FTIR spectra reveal a Lewis base-acid interaction between Pb2+ and polymer, confirming the passivation of CPIB perovskite. Scanning electron microscopy analysis shows a dual-surface morphology with microribbons and microcrystals in perovskites. After PMMA treatment, CPIB perovskite exhibits a blue shift in the bandgap (1.8 to 1.95 eV), while the PVP induced a redshift, reducing the bandgap to 1.7 eV. Blue shift in PL analysis indicates modification of grain boundaries. A higher lifetime obtained for CPIB/PVP confirms the restraint of non-radiative recombinations. Photodetectors are fabricated with pristine CPIB, CPIB/PVP, and CPIB/PMMA perovskites. The passivated CPIB/PVP-based photodetector exhibits a quick rise time of approximate to 23 ms and a decay time of approximate to 17 ms. It also demonstrates a remarkable photoresponsivity of 23 mA W-1, an internal quantum efficiency of 4.9%, and a detectivity of 15.0 x 10(10) Jones at 10 mW cm(-2) light intensity. This approach shows the potential for environmentally stable polymers to passivate inorganic perovskites for high photodetection performance.

关键词： lewis acid-base interaction perovskite passivation photodetector polymer solution processability

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