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Air-stable triarylamine-based amorphous polymer as donor material for bulk-heterojunction organic solar cells |
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| Authors: | Takeshi Yasuda Takao SuzukiMitsuru Takahashi Liyuan Han |
| Affiliation: | a Organic Thin-Film Solar Cells Group, Photovoltaic Materials Unit, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan b PRESTO, Japan Science and Technology (JST) Agency, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan c Tosoh Corporation, 4560 Kaisei-cho, Shunan, Yamaguchi 746-8501, Japan |
| Abstract: | A new air-stable triarylamine-based amorphous polymer, TSP-T11, which consists of thiophene and triarylamine units, can be successfully utilized to fabricate bulk-heterojunction organic photovoltaics (OPVs) using PC60BM or PC70BM as acceptor materials. The highest level of performance of OPVs optimized at TSP-T11:PC70BM (weight ratios of 1:4) with thicknesses of 68 nm exhibited an open circuit voltage (Voc) of 0.75 V, a short circuit current (Jsc) of 8.03 mA cm−2, and a power-conversion efficiency (PCE) of 2.22% under simulated air mass 1.5 solar irradiation at 100 mW cm−2. Although TSP-T11 has a lower hole mobility (1.5×10−4 cm2 V−1 s−1) than P3HT, the use of amorphous film of TSP-T11 as a donor material for OPVs offers advantages over the use of polycrystalline film of P3HT in terms of its air-stability and pinhole-free homogeneous morphology. |
| Keywords: | Bulk heterojunction Solar cell Polymer Amorphous Triarylamine Transistor |
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