Improved Light Harvesting and Improved Efficiency by Insertion of an Optical Spacer (ZnO) in Solution-Processed Small-Molecule Solar Cells
- Authors
- Kyaw, Aung Ko Ko; Wang, Dong Hwan; Wynands, David; Zhang, Jie; Nguyen, Thuc-Quyen; Bazan, Guillermo C.; Heeger, Alan J.
- Issue Date
- Aug-2013
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Solution-processed small-molecule solar cell; optical spacer; ZnO nanoparticle; recombination
- Citation
- NANO LETTERS, v.13, no.8, pp 3796 - 3801
- Pages
- 6
- Journal Title
- NANO LETTERS
- Volume
- 13
- Number
- 8
- Start Page
- 3796
- End Page
- 3801
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/42167
- DOI
- 10.1021/nl401758g
- ISSN
- 1530-6984
1530-6992
- Abstract
- We demonstrate that the power conversion efficiency can be significantly improved in solution-processed small-molecule solar cells by tuning the thickness of the active layer and inserting an optical spacer (ZnO) between the active layer and the Al electrode. The enhancement in light absorption in the cell was measured with UV-vis absorption spectroscopy and by measurements of the photoinduced carriers generation rate. The ZnO layer used to improve the light-harvesting increases the charge collection efficiency, serves as a blocking layer for holes, and reduces the recombination rate. The combined optical and electrical improvements raise the power conversion efficiency of solution-processed small-molecule solar cells to 8.9%, that is, comparable to that of polymer counterparts.
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Collections - College of ICT Engineering > School of Integrative Engineering > 1. Journal Articles
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