Novel symmetric squaraine chromophore containing triphenylamine for solution processed small molecule bulk heterojunction solar cells
- Authors
- So, Seulgi; Choi, Hyunbong; Kim, Chulwoo; Cho, Nara; Ko, Haye Min; Lee, Jae Kwan; Ko, Jaejung
- Issue Date
- 12월-2011
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Bulk heterojunction solar cell; Small molecule; Squaraine; Molecular engineering
- Citation
- SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.95, no.12, pp.3433 - 3441
- Indexed
- SCIE
SCOPUS
- Journal Title
- SOLAR ENERGY MATERIALS AND SOLAR CELLS
- Volume
- 95
- Number
- 12
- Start Page
- 3433
- End Page
- 3441
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111030
- DOI
- 10.1016/j.solmat.2011.07.034
- ISSN
- 0927-0248
- Abstract
- New symmetrical low band-gap small molecule materials, SQ-bis[HP-HT2-TPA] and SQ-bis[HP-HT2-BT] incorporating as novel derivative of squaraine-pyrrole framework and pi-extended thiophene with triphenyamine (TPA) and benzothiophene (BT) end group, have been synthesized and characterized. The effects of TPA moiety were investigated. Compared to SQ-bis[HP-HT2-BT], SQ-bis[HP-HT2-TPA] exhibited three times improved transporting property of hole carrier and four times enhanced absorptivity by more efficient intermolecular pi-pi it interaction for high-efficiency bulk heterojunction (BHJ) device, suggesting that TPA contributes to a better hole mobility. The bulk-heterojunction photovoltaic devices fabricated with SQ-bis[HP-HT2-TPA]/C(71)-PCBM BHJ] film had an average power-conversion efficiency of 1.83%(+/- 0.12) under 100 mW/cm(2), with a short-circuit cur +/- rent (J(sc)) of 9.32 mA/cm(2), fill factor (FF) of 0.30, and open-circuit voltage (V(oc)) of 0.65 V. which has similar to 42% higher efficiency compared to SQ-bis[HP-HT2-BTI/C(71)-PCBM BHJ films. (C) 2011 Elsevier B.V. All rights reserved.
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Collections - College of Science and Technology > Department of Advanced Materials Chemistry > 1. Journal Articles
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