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Reducing Burn-In Loss of Organic Photovoltaics by a Robust Electron-Transporting Layer
- Title
- Reducing Burn-In Loss of Organic Photovoltaics by a Robust Electron-Transporting Layer
- Authors
- Oh, Hyerim; Sim, Ha-Bin; Han, Seung Hee; Kwon, Yong-Ju; Park, Jae Hyun; Kim, Myung Hwa; Kim, Jin Young; Kim, Won-Suk; Kim, Kyungkon
- Ewha Authors
- 김명화; 김원석; 김경곤
- SCOPUS Author ID
- 김명화
; 김원석
; 김경곤![scopus](/images/layout/icon2.png)
- Issue Date
- 2019
- Journal Title
- ADVANCED MATERIALS INTERFACES
- ISSN
- 2196-7350
- Citation
- ADVANCED MATERIALS INTERFACES vol. 6, no. 12
- Keywords
- burn-in loss; interfacial layers; organic solar cells; oxide nanoparticles; stability
- Publisher
- WILEY
- Indexed
- SCIE; SCOPUS
![WOS](/images/layout/wos.gif)
- Document Type
- Article
- Abstract
- It is revealed that instability of interface between photoactive layer and electron-transporting layer (ETL) is one of the causes of the rapid degradation of organic photovoltaics (OPV) performance during initial operation (burn-in loss) under the light soaking. The stability of OPV is greatly enhanced by applying a robust ETL composed of TiO2 nanoparticles (TNPs). The TNPs bound with pi-pi interactive 3-phenylpentane-2,4-dione (TNP-Ph) form more robust ETLs than those bound with van der Waals interactive 3-methyl-2,4-pentanedione TNP (TNP-Me). The OPV with TNP-Ph maintains 73% of its initial power conversion efficiency (PCE) after 1000 h of light soaking, whereas the PCE of OPV with TNP-Me substantially reduces to 25% of initial PCE. The impedance analysis reveals that the burn-in loss is due to increase of resistance at the TNP ETL/photoactive layer interface during the light soaking. The transmission electron microscopy analysis shows that the TNP-Ph maintains most clear and robust interface with photoactive layer after the light-soaking test. This is attributed to the strong pi-pi interaction between phenyl rings of TNP-Ph. However, the TNP-Me bound with van der Waals interactive organic ligands penetrates the photoactive layer during the light-soaking test.
- DOI
- 10.1002/admi.201900213
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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