Improvement of polycarbazole-based organic bulk-heterojunction solar cells using 1,8-diiodooctane
- Authors
- Liu, Zhihai; Ju, Heongkyu; Lee, Eun-Cheol
- Issue Date
- 23-Sep-2013
- Publisher
- AMER INST PHYSICS
- Citation
- APPLIED PHYSICS LETTERS, v.103, no.13
- Journal Title
- APPLIED PHYSICS LETTERS
- Volume
- 103
- Number
- 13
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/14296
- DOI
- 10.1063/1.4823582
- ISSN
- 0003-6951
- Abstract
- The use of 1,8-diiodooctane (DIO) as a solvent additive in poly[N-9'-heptadecanyl-2,7-carbazole-alt-5, 5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT)-based bulk-heterojunction solar cells increased the power conversion efficiency (PCE) by 20.9%. This improvement was due to the increase in the fill factor and open-circuit voltage (V-oc), which compensated for the decrease in the short-circuit current (J(sc)). DIO had the opposite effect, increasing J(sc) and decreasing V-oc, in the devices using other low-band gap polymers. The best sample in this study showed a PCE of 6.27% and V-oc of 939mV, indicating that the fabricated device is an efficient solar cell with a high V-oc close to 1V. (C) 2013 AIP Publishing LLC.
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