A novel star-shaped molecule based on triphenylamine as the core and 5,5-bibenzo[c][1,2,5]thiadiazole as arms (S(TPA-BBT)) was synthesized and investigated as an electron acceptor in solution-processed organic solar cells. The compound S(TPA-BBT) shows excellent thermal stability with a decomposition temperature of 353 °C. S(TPA-BBT) in chloroform solution exhibits two absorption peaks at 326 and 450 nm, which red shifts to 334 and 482 nm in thin film, respectively. The HOMO and LUMO energies are estimated to be â5.48 and â3.10 eV, respectively, from electrochemistry, and match with those of poly(3-hexylthiophene) (P3HT). Solution-processed solar cells based on P3HT:S(TPA-BBT) after annealing at 150 °C for 10 min yield power conversion efficiencies up to 0.81%.
一种新型星形分子(以
三苯胺为核心,5,5-
联苯并[c][1,2,5]
噻二唑为臂)(S(
TPA-BBT))被合成并作为溶液加工有机太阳能电池中的电子受体进行了研究。化合物S(
TPA-BBT)具有优异的热稳定性,分解温度为353°C。S(
TPA-BBT)在
氯仿溶液中呈现两个吸收峰,分别为326和450纳米,在薄膜中分别红移至334和482纳米。根据电
化学原理,HOMO和LUMO能量分别估计为-5.48和-3.10电子伏特,与聚(
3-己基噻吩)(P3HT)的能量相符。在150°C下退火10分钟后,基于P3HT:S(
TPA-BBT)的溶液加工太阳能电池的功率转换效率可达0.8