Effect of ZnO Electron Extraction Layer on Charge Recombination and Collection Properties in Organic Solar Cells
Source abstract
Abstract
The effect of zinc oxide (ZnO) electron extraction layer (EEL) on charge recombination and collection properties in bulk-heterojunction (BHJ) organic solar cells (OSCs), based on a poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6- diyl] [3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7):3′H-cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC70BM) blend system, has been analyzed using the transient photocurrent (TPC) and photoinduced charge extraction by linearly increasing voltage (photo-CELIV) measurements. The TPC and photo-CELIV results indicate that the trap-limited bimolecular recombination can be strongly suppressed by interposing a 20 nm thick ZnO EEL between the BHJ and cathode, leading to a 9.4% increase in power conversion efficiency. The presence of ZnO EEL is beneficial in efficient operation of OSCs in two ways: (1) suppressing trap-limited bimolecular recombination and (2) enhancing the charge collection at the organic/cathode interface.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Thin-Film Transistor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
Department of Physics, Research Centre of Excellence for Organic Electronics, and Institute of Advanced Materials, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, Hong Kong, China
State Key Laboratory of Supramolecular Structures and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Funding
Research Grants Council, University Grants Committee · Ministry of Science and Technology of the People's Republic of China · Hong Kong Baptist University · National Natural Science Foundation of China · Program for Changbaishan Scholars of Jilin Province
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