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- Title
Efficient Inverted Solar Cells Using Benzotriazole-Based Small Molecule and Polymers.
- Authors
Lee, Ja Eun; Kim, Yoon; Na, Yang Ho; Baek, Nam Seob; Jung, Jae Woong; Choi, Yura; Cho, Namchul; Kim, Tae-Dong; Ulanski, Jacek; Luszczynska, Beata
- 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%, Jsc: 9.95 mA/cm2, Voc: 0.89 V, and FF: 57.0%). We believe that this is attributed to high energy transfer and excellent film morphologies.
- Subjects
SOLAR cells; SMALL molecules; POLYMERS; ENERGY transfer; CARBAZOLE; FULLERENE polymers; BENZOTRIAZOLE derivatives; BENZOTRIAZOLE
- Publication
Polymers (20734360), 2021, Vol 13, Issue 3, p393
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym13030393