High Mobility Indium Oxide Electron Transport Layer for an Efficient Charge Extraction and Optimized Nanomorphology in Organic Photovoltaics

• DOI: 10.1021/acs.nanolett.8b02452
• Publication Date: 2018-08-03T21:56:59Z
• Authors: Wenchao Huang; Bowen Zhu; Sheng-Yung Chang; Shuanglin Zhu; Pei Cheng; Yao-Tsung Hsieh; Lei Meng; Rui Wang; Chaochen Wang; Chenhui Zhu; Christopher McNeill; Mingkui Wang; Yang Yang
• Keywords: Electron Mobility; Indium tin oxide; Organic semiconductor; Transport layer

The electron transport layer (ETL) plays an important role in determining the device efficiency of organic solar cells (OSCs). A rational design ETL for OSCs targets high charge extraction and induction optimized active morphology. In this Letter, a mobility In2O3 synthesized via solution-processed combustion reaction is successfully used as universal photovoltaic device. With modification thin polyethylenimine ethoxylated (PEIE), based on crystalline outperforms its counterpart, ZnO, both PBDTTT-EFT-based fullerene nonfullerene systems. As ZnO replaced by In2O3, average increases from 9.5% to 10.5% PBDTTT-EFT–PC71BM fullerene-based also 10.8% 11.5% PBDTTT-EFT–IEICO-4F nonfullerene-based cells, respectively. Morphological studies have unraveled fact that with highly aligned nanocrystallites has induced crystallization polymer into preferential molecular packing favors across layer. From photophysical study, it found significantly faster than due higher nanomorphology