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solution-processing Electrophosphorescence with High-Efficiency and Low-Efficiency Roll-Off from Iridium(III) Complex Containing Multiple Resonance Core

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ADVANCED OPTICAL MATERIALS 2025年第0期

作者： Feng, Yu Zhuang, Xuming Qu, Yupei Liu, Yu Xu, Yincai Wang, Yue Jilin Univ Coll Chem State Key Lab Supramol Struct & Mat Changchun 130012 Peoples R China Jihua Lab 28 Huandao Nan Rd Foshan 528200 Guangdong Peoples R China

solution-processing phosphorescent organic light-emitting diodes (s-PhOLEDs) based on heavy metal complexes deliver simpler fabrication processes, lower production costs, and higher material utilization rates than thermal-evaporation phosphorescent OLEDs (t-PhOLEDs), making them a strong competitor in large-sized panel manufacturing. However, s-PhOLEDs face two significant challenges: low electroluminescence efficiency and large efficiency roll-off at high luminance. Herein, the design and synthesis of an orbitally symmetric octahedral metallophosphor iridium(III) complex (BNPPy)2-Ir-acac containing dual B,N-embedded multiple resonance emitters are reported. By blending emitter (BNPPy)2-Ir-acac in a p-n type premixed host, the doped film fabricated by spin coating has a photoluminescence quantum yield of 91% and a horizontal emitting dipole orientation ratio of 73%. The emitter (BNPPy)2-Ir-acac-based s-PhOLED exhibits yellow emission with a peak of 552 nm. The external quantum efficiencies (EQEs) are 27.8% and 32.9% at 100 and 1000 cd m-2, respectively;the EQE reaches a maximum of 33.2% at 2118 cd m-2;and the EQEs remain 28.5% and 24.9% at 5000 and 10 000 cd m-2, respectively.

关键词： high-efficiency iridium(III) complex low efficiency roll-off organic light-emitting diodes solution-processing

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solution-processing approach of nanomaterials toward an artificial sensory system

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International Journal of Extreme Manufacturing 2024年第5期6卷 1-19页

作者： Okin Song Youngwook Cho Soo-Yeon Cho Joohoon Kang School of Advanced Materials Science and Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea School of Chemical Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Artificial sensory systems have emerged as pivotal technologies to bridge the gap between the virtual and real-world,replicating human senses to interact intelligently with external *** practically apply artificial sensory systems in the real-world,it is essential to mass-produce nanomaterials with ensured sensitivity and selectivity,purify them for desired functions,and integrate them into large-area sensory devices through assembly techniques.A comprehensive understanding of each process parameter from material processing to device assembly is crucial for achieving a high-performing artificial sensory *** review provides a technological framework for fabricating high-performance artificial sensory systems,covering material processing to device *** introduce recent approaches for dispersing and purifying various nanomaterials including 0D,1D,and 2D *** then highlight advanced coating and printing techniques of the solution-processed nanomaterials based on representative three methods including(i)evaporation-based assembly,(ii)assisted assembly,and(iii)direct *** explore the application and performances of these solution-processed materials and printing methods in fabricating sensory devices mimicking five human senses including vision,olfaction,gustation,hearing,and tactile ***,we suggest an outlook for possible future research directions to solve the remaining challenges of the artificial sensory systems such as ambient stability,device consistency,and integration with AI-based software.

关键词： artificial sensory system nanomaterials solution-processing printing sensor

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Present Status of solution-processing Routes for Cu(In,Ga)(S,Se)₂ Solar Cell Absorbers

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ADVANCED ENERGY MATERIALS 2021年第14期11卷 2003743-2003743页

作者： Suresh, Sunil Uhl, Alexander R. Univ British Columbia Lab Solar Energy & Fuels LSEF Sch Engn Kelowna BC V1V 1V7 Canada

Photovoltaic technologies offer a sustainable solution to the challenge of meeting increasing energy demands. Chalcopyrite Cu(In,Ga)(S,Se)(2), short CIGS-thin-film solar cells-having intrinsically p-type absorbers with a tunable direct bandgap-exhibits one of the highest stabilized power conversion efficiencies of 23.35%, utilizing absorbers typically fabricated via vacuum deposition methods. Research is increasingly devoted to absorbers deposited by solution processing techniques, which may inherently improve material usage, increase throughput, and lower financial barriers to commercialization. However, the performance of current devices with solution-processed absorbers is still falling short of their vacuum-processed counterparts with record power conversion efficiencies up to 18.7% reported to date. While hydrazine solvent-based routes offer reduced residual impurities, their toxicity poses hindrances to widespread adoption. Alternatively, less toxic and environmentally friendly routes based on protic and aprotic solvents are being researched and are showing promising device efficiencies well above 14%. This review describes the current status of CIGS solar cell absorber layers fabricated by pure solution-based deposition methods, provides a comparison of champion solution-processed devices (with and without hydrazine), and offers an outlook for future improvements.

关键词： chalcogenides chalcopyrites CIGS Cu(In,Ga)(S,Se)(2) non-vacuum deposition solution-processing

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A Cross-Linked Interconnecting Layer Enabling Reliable and Reproducible solution-processing of Organic Tandem Solar Cells

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ADVANCED ENERGY MATERIALS 2020年第12期10卷 1903800-1903800页

作者： Liu, Chao Du, Xiaoyan Gao, Shuai Classen, Andrej Osvet, Andres He, Yakun Mayrhofer, Karl Li, Ning Brabec, Christoph J. Friedrich Alexander Univ Erlangen Nurnberg Dept Mat Sci & Engn Inst Mat Elect & Energy Technol I MEET D-91058 Erlangen Germany Erlangen Grad Sch Adv Opt Technol SAOT Paul Gordan Str 6 D-91052 Erlangen Germany Helmholtz Inst Erlangen Nurnberg Renewable Energy Egerlandstr 3 D-91058 Erlangen Germany Helmholtz Inst Erlangen Nurnberg Renewable Energy Immerwahrstr 2 D-91058 Erlangen Germany Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Zhengzhou 450002 Peoples R China

The performance of tandem organic solar cells (OSCs) is directly related to the functionality and reliability of the interconnecting layer (ICL). However, it is a challenge to develop a fully functional ICL for reliable and reproducible fabrication of solution-processed tandem OSCs with minimized optical and electrical losses, in particular for being compatible with various state-of-the-art photoactive materials. Although various ICLs have been developed to realize tandem OSCs with impressively high performance, their reliability, reproducibility, and generic applicability are rarely analyzed and reported so far, which restricts the progress and widespread adoption of tandem OSCs. In this work, a robust and fully functional ICL is developed by incorporating a hydrolyzed silane crosslinker, (3-glycidyloxypropyl)trimethoxysilane (GOPS), into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and its functionality for reliable and reproducible fabrication of tandem OSCs based on various photoactive materials is validated. The cross-linked ICL can successfully protect the bottom active layer against penetration of high boiling point solvents during device fabrication, which widely broadens the solvent selection for processing photoactive materials with high quality and reliability, providing a great opportunity to continuously develop the tandem OSCs towards future large-scale production and commercialization.

关键词： (3-glycidyloxypropyl)trimethoxysilane cross-linking interconnecting layer organic tandem solar cells solution-processing

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solution-processing of High-Purity Semiconducting Single-Walled Carbon Nanotubes for Electronics Devices

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ADVANCED MATERIALS 2019年第9期31卷 e1800750-e1800750页

作者： Qiu, Song Wu, Kunjie Gao, Bing Li, Liqiang Jin, Hehua Li, Qingwen Chinese Acad Sci Suzhou Inst Nanotech & Nanobion Key Lab Nanodevices & Applicat Suzhou 215123 Peoples R China Jiangnan Univ Sch Chem & Mat Engn Wuxi 214122 Peoples R China

High-purity semiconducting single-walled carbon nanotubes (s-SWCNTs) are of paramount significance for the construction of next-generation electronics. Until now, a number of elaborate sorting and purification techniques for s-SWCNTs have been developed, among which solution-based sorting methods show unique merits in the scale production, high purity, and large-area film formation. Here, the recent progress in the solution processing of s-SWCNTs and their application in electronic devices is systematically reviewed. First, the solution-based sorting and purification of s-SWCNTs are described, and particular attention is paid to the recent advance in the conjugated polymer-based sorting strategy. Subsequently, the solution-based deposition and morphology control of a s-SWCNT thin film on a surface are introduced, which focus on the strategies for network formation and alignment of SWCNTs. Then, the recent advances in electronic devices based on s-SWCNTs are reviewed with emphasis on nanoscale s-SWCNTs' high-performance integrated circuits and s-SWCNT-based thin-film transistors (TFT) array and circuits. Lastly, the existing challenges and development trends for the s-SWCNTs and electronic devices are briefly discussed. The aim is to provide some useful information and inspiration for the sorting and purification of s-SWCNTs, as well as the construction of electronic devices with s-SWCNTs.

关键词： electronic devices high-purity semiconducting single-walled carbon nanotubes solution-processing

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Design, Simulation, and solution processing of Spectrally-Selective Mirrors for Luminescent Solar Concentrators

Design, Simulation, and Solution Processing of Spectrally-Se...

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作者： Mayes, Eleanor University of Minnesota

学位级别：硕士

This thesis investigates the design, simulation, and solution processing of spectrally-selective mirrors for use in Luminescent Solar Concentrators (LSCs). Luminescent Solar Concentrators are transparent photovoltaic devices that can be applied to windows. Photons incident on the LSC are absorbed by luminophores within the device, which then emit photons at longer wavelengths (via photoluminescence). This light is then internally reflected across the LSC waveguide to its edges wherephotovoltaic cells are located, which convert the light to electricity. Some photons that are emitted by luminophores do not remain in the waveguide; if the photons are emitted at an angle less than the critical angle (determined by the refractive index surrounding mediums) they are lost to the environment. This reduces the efficiency of the LSC substantially. To improve this trapping efficiency, spectrally-selective mirrors can be placed above and below the waveguide in order to reflect escaped photons back into the device, so they potentially reach the photovoltaic cells. These spectrally-selective mirrors are composed of ultra-thin-film layers of alternating high and low refractive index materials, forming a 1D photonic crystal. The mirror design is dependent on the thickness and refractive index of each layer, and manipulating these parameters results in different reflectivity spectra. Using Monte Carlo and analytical models to simulate LSCs with spectrally-selective mirrors, designs are evaluated and optimized to best improve the optical efficiency of this particular LSC, with its particular dimensions and composition. Concurrently, thin-films of dielectric material are fabricated via sol-gel synthesis and solution-processing techniques such as spin-coating, doctor-blading, and bar coating. These films and their optical properties are then evaluated and characterized using spectroscopic ellipsometry. The work presented in this thesis weaves together fundamental aspects of thin-film d

关键词： color science LSC solar solution-processing spectrally-selective mirror window

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Bandgap-tunable double-perovskite thin films by solution processing

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MATERIALS TODAY 2019年 28卷 25-30页

作者： Liu, Yuan Zhang, Li Wang, Min Zhong, Yujia Huang, Meirong Long, Yu Zhu, Hongwei Tsinghua Univ Sch Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China Chinese Acad Sci Tech Inst Phys & Chem Key Lab Photochem Convers & Optoelect Mat Beijing 100190 Peoples R China

Narrowing the bandgap of lead-free double-perovskite Cs2AgBiBr6 is required for using this material in future photovoltaics. Herein, we demonstrate a bandgap engineering of Cs2AgBiBr6 by introducing Sb to substitute up to 75% of Bi via a versatile solution-processed method in dimethyl sulfoxide at 180 degrees C. The resultant Cs2AgSbxBi1-xBr6 (x = 0, 0.25, 0.50, 0.75) thin films possess high crystallinity and good thermostability. Moreover, the Sb substitution enables an obvious bandgap reduction of 0.25 eV. The fabricated solar cell using the Cs2AgSbxBi1-xBr6 (x = 0.25) thin film obtained an increased performance than the reference Cs2AgBiBr6. The effective bandgap narrowing via a facile solution method might accelerate the development of Cs2AgBiBr6-based materials for photovoltaic applications.

关键词： Double perovskite solution-processing Bandgap Thin films

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Rational molecular design of efficient yellow-red dendrimer TADF for solution-processed OLEDs: a combined effect of substitution position and strength of the donors

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Science China Chemistry 2024年第5期67卷 1613-1623页

作者： Changfeng Si Dianming Sun Tomas Matulaitis David B.Cordes Alexandra M.Z.Slawin Eli Zysman-Colman Organic Semiconductor Centre EaStCHEM School of ChemistryUniversity of St AndrewsSt AndrewsKY169STUK

The development of high-performance solution-processed red organic light-emitting diodes(OLEDs) remains a challenge,particularly in terms of maintaining efficiency at high luminance. Here, we designed and synthesized four novel orange-red thermally activated delayed fluorescence(TADF) dendrimers that are solution-processable: 2GCz BP, 2DPACz BP, 2FBP2GCz and 2FBP2DPACz. We systematically investigated the effect of substitution position and strength of donors on the optoelectronic properties. The reverse intersystem crossing rate constant(kRISC) of the emitters having donors substituted at positions 11and 12 of the dibenzo[a,c]phenazine(BP) is more than 10-times faster than that of compounds substituted having donors substituted at positions 3 and 6. Compound 2DPACz BP, containing stronger donors than 2GCz BP, exhibits a red-shifted emission and smaller singlet-triplet energy splitting, ΔE_(ST), of 0.01 e V. The solution-processed OLED with 10 wt% 2DPACz BP doped in m CP emitted at 640 nm and showed a maximum external quantum efficiency(EQE_(max)) of 7.8%, which was effectively maintained out to a luminance of 1,000 cd m-2. Such a device's performance at relevant display luminance is among the highest for solution-processed red TADF OLEDs. The efficiency of the devices was improved significantly by using 4Cz IPN as an assistant dopant in a hyperfluorescence(HF) configuration, where the 2DPACz BP HF device shows an EQEmaxof 20.0% at λEL of 605 nm and remains high at 11.8% at a luminance of 1,000 cd m-2, which makes this device one of the highest efficiency orange-to-red HF SP-OLEDs to date.

关键词： thermally activated delayed fluorescence solution-processing red OLEDs dibenzo[a,c]phenazine dendrimers

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solution-Processed MoS2-Expanded Graphite as a Fast-Charging Anode for Lithium-Ion Batteries

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CHEMISTRY-AN ASIAN JOURNAL 2025年第5期20卷 e202401044页

作者： Lobo, Kenneth Moolayadukkam, Sreejesh Vishwanathan, Savithri Matte, H. S. S. Ramakrishna Ctr Nano & Soft Matter Sci Energy Mat Lab Bangalore 562162 India Univ Southern Calif Dept Aerosp & Mech Engn Los Angeles CA 90089 USA Univ Southern Calif Iovine & Young Acad Los Angeles CA 90089 USA

The widespread demand for battery-powered technologies has propelled the search for efficient and commercially viable electrode materials with fast-charging abilities. Reported herein is an MoS2-expanded graphite (EG) composite as a stable and high-rate lithium-ion battery (LIB) anode, delivering specific capacities of 796 mAh g(-1) at 0.5 A g(-1) and 320 mAh g(-1) at 20 A g(-1) over 400 cycles. Cyclability at extreme rates up to 50 A g(-1) (similar to 10(3) mAh g(-1)) illustrates its scope for fast charging applications. As a result of the processing technique, the exfoliated nanosheets have good interfacial contact which aids in charge transfer and maintaining structural integrity during continuous battery operation. Further, analytical electrochemical methods suggest a predominance of pseudocapacitive charge storage mechanism, explaining the anode performance at high rates.

关键词： Fast-charging Batteries Expanded graphite solution-processing Anode

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Phenethylammonium Halide Blend as an Efficient Interlayer in solution-Processed Inverted Planar p-i-n Perovskite Solar Cells

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ACS APPLIED ENERGY MATERIALS 2025年第5期8卷 2837-2844页

作者： Chakrabarti, Tanwistha Kaarthik, Sai Perumal, Ajay Indian Inst Sci Educ & Res IISER Dept Phys Sci Funct NANO & Optoelect Lab FNOL Berhampur 760010 Odisha India

Inverted planar (p-i-n) perovskite solar cells (PSCs) are gaining popularity due to their low-temperature processability, excellent device stability, flexibility, and negligible J-V hysteresis. In solution-processed p-i-n PSCs, the interface between the HTL (hole transport layer) and the perovskite absorber is vital in determining the device performance. To improve this interface, currently, the approaches involve expensive materials and complex processing methods. Herein, we introduce a blend of two alkylammonium halides, phenethylammonium iodide (PEAI) and phenethylammonium bromide (PEABr), as an interlayer on top of the Spiro-based HTL in p-i-n PSCs with a cost-effective approach, which significantly improves the interface quality, wettability (improving the hydrophilicity), and energy alignment, resulting in improved photovoltaic device performance. An optimized ratio of PEAI to PEABr results in optimized device performance having a power conversion efficiency (PCE) greater than 18% with a short-circuit current density (J SC) of 22.71 mA cm-2, an open-circuit voltage (V OC) of 1.09 V, and a fill factor (FF) of 74.78%. In comparison to devices using a polymeric interlayer (PFN-P1), the phenethylammonium halide blend interlayer-based devices offer comparable efficiency at a much lower cost and with a simpler fabrication process. Moreover, it avoids the need for an ultrathin layer formation. Thermal stability tests demonstrate that devices with the phenethylammonium halide blend interlayer retain over 80% of their initial efficiencies after more than 700 h of thermal aging at 85 degrees C, showing better durability compared to PFN-P1 polymer interlayer-based devices.

关键词： perovskite solar cells p-i-n architecture interlayermodification surface treatment HTL/absorber interface cost-effective solution-processing

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