Study of light-induced degradation of polymer: fullerene solar cells. (19th May 2022)

• Record Type: Journal Article
• Authors: Sharma, Abhishek; Chauhan, Mihirsinh; Patel, Jessica; Pandey, Manoj Kumar; Tripathi, Brijesh; Tiwari, J. P.; Chand, Suresh
• Is Part Of: New journal of chemistry. Volume 46:Number 22(2022)
• Page Start: 10765
• Page End: 10776
• Publication Date: 2022-05-19
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj02001g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : In the present study, the role of active and transport layer materials in the degradation mechanism is studied using different device geometries. Abstract : In the present study, the role of active and transport layer materials in the degradation mechanism is studied using different device geometries. Initially, the absorbance of the active layer materials as a function of the degradation time is compared with the photovoltaic characteristics. Also, it has been found that the hole- and electron-transport layers play a pivotal role in the degradation process for the observed decreased device efficiency. The theoretical charge-transport model complements these experimental photovoltaic parameters well. The results are attributed to the change in the quasi-Fermi level, and exciton splitting for the fresh and aged devices. These interesting and impactful results reveal a basic understanding of the degradation mechanism for the P3HT:PC71 BM and PTB7:PC71 BM blend systems and provide insights for achieving long-term stability in such solar-cell devices.