Comparison of small amounts of polycrystalline donor materials in C 70-based bulk heterojunction photovoltaics and optimization of dinaphthothienothiophene based photovoltaic

Yan Qiong Zheng, William J. Potscavage, Qi Sheng Zhang, Takeshi Komino, Masatsugu Taneda, Chihaya Adachi

研究成果: Contribution to journalArticle査読

24 被引用数 (Scopus)

抄録

Comparative studies of the effects of a series of polycrystalline donors on the performance of 95 wt.%-C70-based bulk-heterojunction (BHJ) photovoltaics were conducted. A BHJ based on the wide band-gap molecule dinaphthothienothiophene (DNTT) shows power conversion efficiency (ηPCE) of up to 4.28%. The photovoltaic parameters are superior to those of devices using the similar molecule pentacene (PEN) or polycrystalline copper phthalocyanine (CuPc) for donor concentrations from 5 to 30 wt.%. The low-lying DNTT ionization potential and the high μh in the DNTT blend support the excellent DNTT device performance. The low performance of BHJs with 5 wt.% PEN and 5 wt.% CuPc may stem from strong exciplex recombination in the PEN:C70 blend and limited hole mobility combined with geminate polaron-pair recombination in the CuPc:C70 blend. The zero-field hole mobility of the blends with 5 wt.% donor has a positive correlation with the corresponding device performance. The ηPCE of a 5 wt.%-DNTT BHJ cell was improved to 4.92% by optimizing the cathode buffer layer.

本文言語英語
ページ(範囲)878-885
ページ数8
ジャーナルOrganic Electronics
15
4
DOI
出版ステータス出版済み - 4 2014

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学
  • 電子工学および電気工学

フィンガープリント

「Comparison of small amounts of polycrystalline donor materials in C <sub>70</sub>-based bulk heterojunction photovoltaics and optimization of dinaphthothienothiophene based photovoltaic」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル