Impact of donor, acceptor, and blocking layer thickness on power conversion efficiency for small-molecular organic solar cells
- Authors
- Lee, Su-Hwan; Kim, Dal-Ho; Kim, Ji-Heon; Shim, Tae-Hun; Park, Jea-Gun
- Issue Date
- Sep-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Organic solar cell; Donor layer; Acceptor layer; Small-molecular; Photovoltaic cell
- Citation
- SYNTHETIC METALS, v.159, no.17-18, pp.1705 - 1709
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 159
- Number
- 17-18
- Start Page
- 1705
- End Page
- 1709
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176253
- DOI
- 10.1016/j.synthmet.2009.05.010
- ISSN
- 0379-6779
- Abstract
- We investigated the dependency of the power conversion efficiency on the thickness of donor (copper phthalocyanine; CuPc), acceptor (fullerene; C-60), and hole/exciton blocking (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline: BCP) layers in the OPV devices fabricated with double small-molecular layers. The power conversion efficiency peaked at a specific layer thickness, similar to 12.7 nm for the donor layer, similar to 17.5 nm for the acceptor layer, and similar to 8.0 nm for the hole/exciton blocking layer. This trend of power conversion efficiency was determined by short-circuit-current rather than open-circuit-voltage after light absorption. In addition, the donor layer thickness was more sensitive than the thickness of the acceptor or hole/exciton blocking layers in improving power conversion efficiency; i.e., similar to 330% for the donor layer, similar to 118% for the acceptor layer, and similar to 112% for the hole/exciton blocking layers.
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