博士研究員 Daobin Yang 君のスクアリリウム誘導体を用いた低エネルギーロス型有機薄膜太陽電池に関する論文、「Low-Bandgap Small Molecule for Efficient Organic Solar Cells with a Low Energy Loss below 0.6 eV and a High Open-Circuit Voltage of over 0.9 V」が、アメリカ化学会 (American Chemical Society) ACS Energy Letters (2016年創刊) にアクセプトされました。Yang 君、おめでとうございます！
Title: Low-Bandgap Small Molecule for Efficient Organic Solar Cells with a Low Energy Loss below 0.6 eV and a High Open-Circuit Voltage of over 0.9 V
By D. Yang, H. Sasabe, T. Sano, J. Kido, ACS Energy Letters, 2017, 2, 2021-2025.
Abstract: Small molecule organic solar cells (SMOSCs) have received considerable attention in the past few years. However, one of the key factors limiting the performance of SMOSCs is their large energy loss, which is typically between 0.6 and 1.0 eV, and therefore significantly higher than those of perovskite solar cells and inorganic solar cells (< 0.5 eV). Herein, we successfully report a new A-D-A-type dimeric squaraine electron donor (D-IDTT-SQ) with a low optical bandgap of 1.49 eV and deep HOMO energy level of −5.20 eV. Consequently, a high open-circuit voltage (Voc) of 0.93 V with an impressive power conversion efficiency (PCE) of 7.05% is achieved for solution-processed bulk heterojunction SMOSCs, showing a of only 0.56 eV. This is the first report wherein SMOSCs result in such a low enrgy loss, while simultaneously exhibiting a considerably high Voc over 0.9 V and an excellent PCE above 7.0%.
