Journal
SOLAR RRL
Volume 1, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201600008
Keywords
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Funding
- Foundation for Innovation Research Groups of the National Natural Science Foundation of China (NSFC) [61421002]
- NSFC [6117703261675041, 21372168, 21674093]
- Project of Science and Technology of Sichuan Province [2016HH0027]
- Fundamental Research Funds for the Central Universities [ZYGX2010Z004]
- Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices [KFJJ201410]
- International Science and Technology Cooperation Program of China (ISTCP) [2016YFE0102900]
- Young 1000 Talents Global Recruitment Program of China
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A interfacial modifier, [5,6]-open azafulleroid (OPCBM) is utilized to engineer the organics-metal oxide heterojunction of inverted organic photovoltaics (OPVs). Mechanistic studies disclose that the OPCBM treatment not only passivates the metal oxide surface defects, but also improves energetic alignment and conductivity of interlayer due to the excited charge transfer characteristics from azafulleroid to ZnOx. With the assistance of p-orbital hybridization from fullerene to the beneath ZnOx (through anchoring group), the electronic coupling and charge transfer from organics to metal oxide are effectively enhanced through the mediation of OPCBM modifier. It enables the overall internal quantum efficiency (IQE) approaching 100% and fill factor of 0.77 for the PTB7-Th:PC71BM based inverted OPVs, with the best PCE as high as 11.3%.
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