期刊
ORGANIC ELECTRONICS
卷 13, 期 12, 页码 3097-3101出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2012.09.005
关键词
Dye sensitized solar cells; Organic dye; Near infra-red; Thienopyrazine; Quinoxaline
资金
- Ministry of Education, and Core Research for Evolutional Science and Technology (CREST) of Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [22550162] Funding Source: KAKEN
Light absorption from visible to NIR region is required to increase the photocurrent and to enhance the photo-energy conversion efficiencies in dye-sensitized solar cells (DSSCs). We have now developed novel thienopyrazine dye TP1 which has absorption up to 700 nm. Quinoxaline dye QX2 with absorption at shorter wavelengths than TP1 has been synthesized for comparisons. The power conversion efficiencies of DSSCs with TP1 and QX2 showed 4.4% and 3.2%, respectively. The absorption edge in IPCE of TP1 reached 800 nm and the open circuit voltage (Voc) of QX2 was high (0.77 V). To improve the device performances, QX2 was used as a co-adsorbent dye with TP1. In the mixed sensitizer based DSSC, a high power conversion efficiency of 6.2% was achieved due to the effective light harvesting and steric effect of QX2. (C) 2012 Elsevier B.V. All rights reserved.
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