期刊
SOLAR RRL
卷 4, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201900420
关键词
low-temperatures; metal oxides; organic solar cells; stabilities; versatilities
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2019R1A2C1009025]
- Development Program of the Korea Institute of Energy Research (KIER) [B8-2421]
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science and ICT [2017M1A2A2087630]
- National Research Foundation of Korea [미래선도형특성화연구] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The interfacial layer (IL) in organic solar cells (OSCs) can be an important boosting factor for improving device efficiency and stability. Herein, a facile and cost-effective approach to form a uniform molybdenum oxide (MoO3) film with desirable stability is provided, based on solution processing at low temperatures by simplified precursor solution synthesis. The solution-processed MoO3 (SM) film, with oxygen vacancies induced by the hydroxyl group, functions as an efficient anode IL in conventional OSCs. The hole-transporting performance of SM is well demonstrated in nonfullerene-based OSCs exhibiting over 10% of power conversion efficiency. The enhanced device performance of SM-based OSCs over that of poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is investigated by analyzing the morphology, electronic state, and electrical conductivity of such a hole-transporting layer, as well as the charge dynamics in the completed devices. Furthermore, the high stability of the SM films in OSCs is examined under various environmental conditions, including long-term and thermal stability. In particular, fullerene-based OSCs with SM maintain over 90% of their initial cell performance over 2500 h under inert conditions. It is shown that solution-processed metal oxides can be viable ILs with high functionality and versatility, overcoming the drawbacks of conventionally adopted conducting polymer interlayers.
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