Premium
Effect of Crystallinity Modulation between Electron Transport Layer and Photo‐Generation Materials on ZnO‐Based Polymer Solar Cells
Author(s) -
Zhang Xiaohua,
Fan Pu,
Han Yu,
Yu Junsheng
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800666
Subject(s) - crystallinity , photocurrent , materials science , layer (electronics) , nanoparticle , optoelectronics , active layer , nanotechnology , electron transport chain , photovoltaic system , polymer , chemical engineering , energy conversion efficiency , electron , composite material , chemistry , ecology , biochemistry , engineering , biology , thin film transistor , physics , quantum mechanics
Abstract As one of the most widely used electron transport layers (ETLs) for inverted polymer solar cells (PSCs), ZnO has great effect on the growth of photo‐generated layer. In this work, the ZnO‐based PSCs with the compositional blend of PffBT4T‐2OD: PCBM and PTB7‐Th: PCBM are fabricated to investigate the crystallinity modulation effect (CME) between electron transport layer and photo‐generation materials. The results showed that both the high crystallinity PffBT4T‐2OD: PCBM processed on the large nanoparticles ZnO and the low crystallinity PTB7‐Th: PCBM processed on small nanoparticles ZnO exhibit excellent photovoltaic performances. By verifying the combination of ZnO nanoparticles with photo‐generation materials, it proves that the CME can result in a smooth photo‐generated layer surface to ensure efficient electron transport as well as collection with suppressed bimolecular recombination, leading to the increase of photocurrent and the improvement of inverted PSCs performance accordingly.