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Simultaneous Improvement of Efficiency and Stability of Non-Fullerene-Based Organic Solar Cells Via Sequential Deposition of Single Donor and Binary Acceptor
- Title
- Simultaneous Improvement of Efficiency and Stability of Non-Fullerene-Based Organic Solar Cells Via Sequential Deposition of Single Donor and Binary Acceptor
- Authors
- Min, Suhyun; Han, Seung Hee; Park, Chanju; Ryu, Ka Yeon; Kim, Kyungkon
- Ewha Authors
- 김경곤
- SCOPUS Author ID
- 김경곤
- Issue Date
- 2021
- Journal Title
- SOLAR RRL
- ISSN
- 2367-198X
- Citation
- SOLAR RRL vol. 5, no. 10
- Keywords
- burn-in; non-fullerene acceptors; organic solar cells; sequential deposition; stability
- Publisher
- WILEY-V C H VERLAG GMBH
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Non-fullerene acceptor (NFA)-based organic solar cells often exhibit significant cell degradation in power conversion efficiency (PCE) in the early stages of operation, called "burn-in." Generally, to fabricate NFA-based solar cells, binary blend solution deposition (binary BSD) of a conjugated polymer and an NFA is utilized. Herein, the reasons for burn-in are investigated by aging organic photovoltaic cells with independent control of temperature and light. The results reveal that burn-in is mainly due to a rapid increase in the interfacial resistance (R (int)) rather than photo-oxidation of the components or oxidation of the electrode. This R-int is effectively suppressed by constructing a ternary photoactive layer through the sequential deposition of a polymer solution and a binary acceptor solution consisting of an NFA and a fullerene acceptor (ternary sequential deposition [ternary SqD]). Under the illumination of 1 sun and thermal annealing at 80 degrees C for 500 h, the binary BSD exhibits a reduction in efficiency of 63% and 59%, respectively, whereas the ternary SqD demonstrates a reduction of only 32% and 35%, respectively. In addition, the ternary SqD improves the PCE on using fullerene acceptors to enhance light harvesting at short wavelengths.
- DOI
- 10.1002/solr.202100592
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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