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

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 

作者机构：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 

出 版 物：《ADVANCED ELECTRONIC MATERIALS》 (Adv. Electron. Mater.)

年 卷 期：2024年第10卷第9期

核心收录：

基　　金：National Renewable Energy Laboratory Ministry of New and Renewable Energy (MNRE), Government of India, New Delhi National Renewable Energy (NRE) fellowship Chhatrapati Shahu Maharaj Research, Training and Human Development Institute (SARTHI), Government of Maharashtra Department of Science and Technology, Government of India, New Delhi Innovation in Science Pursuit for Inspired Research (INSPIRE) fellowship University Grants Commission (UPE program), New Delhi Indo-French Centre for the Promotion of Advanced Research-CEFIPRA, Department of Science and Technology, New Delhi Khalifa University of Science and Technology 

主　　题：lewis acid-base interaction perovskite passivation photodetector polymer solution processability 

摘      要：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.