Efficient Inverted Solar Cells Using Benzotriazole-Based Small Molecule and Polymersopen access
- Authors
- Lee, Ja Eun; Kim, Yoon; Na, Yang Ho; Baek, Nam Seob; Jung, Jae Woong; Choi, Yura; Cho, Namchul; Kim, Tae-Dong
- Issue Date
- Feb-2021
- Publisher
- MDPI Open Access Publishing
- Keywords
- polymer solar cells; small-molecule solar cells; morphology; benzotriazole; molecular aggregation
- Citation
- Polymers, v.13, no.3
- Journal Title
- Polymers
- Volume
- 13
- Number
- 3
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/2063
- DOI
- 10.3390/polym13030393
- ISSN
- 2073-4360
- Abstract
- We synthesized medium-band-gap donor-acceptor (D-A) -type conjugated polymers (PBTZCZ-L and PBTZCZ-H) consisting of a benzotriazole building block as an acceptor and a carbazole unit as a donor. In comparison with the polymers, a small conjugated molecule (BTZCZ-2) was developed, and its structural, thermal, optical, and photovoltaic properties were investigated. The power conversion efficiency (PCE) of the BTZCZ-2-based solar cell devices was less than 0.5%, considerably lower than those of polymer-based devices with conventional device structures. However, inverted solar cell devices configured with glass/ITO/ZnO:PEIE/BTZCZ-2:PC71BM/MoO3/Ag showed a tremendously improved efficiency (PCE: 5.05%, J(sc): 9.95 mA/cm(2), V-oc: 0.89 V, and FF: 57.0%). We believe that this is attributed to high energy transfer and excellent film morphologies.
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Collections - SCH Media Labs > Department of Energy Systems Engineering > 1. Journal Articles
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