Enhanced charge photogeneration promoted by crystallinity in small-molecule donor-acceptor bulk heterojunctions
Enhanced charge photogeneration promoted by crystallinity in small-molecule donor-acceptor bulk heterojunctions
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小分子供体-受体体异质结结晶度促进电荷光生增强
DOI：
10.1063/1.4891758
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发表时间：
2014
影响因子：
4
通讯作者：
O. Ostroverkhova
中科院分区：
文献类型：
--
作者：
Keshab Raj Paudel;B. Johnson;Mattson Thieme;M. Haley;M. Payne;J. Anthony;O. Ostroverkhova
我们研究了具有三种不同受体(A)分子的官能化菲(ADT)供体(D)晶体薄膜中的亚纳秒时间尺度载流子动力学。在含有浓度为7-10 wt.%的富勒烯受体的D/A共混体系中，超快载流子分离效率提高了4倍，而在官能化并五苯和吲哚受体中，峰值光电流幅度随受体浓度的增加而逐渐降低。实验结果与ADT-三(乙基硅基)乙炔-F给电子体的结晶度直接相关。在性能最好的共混物中，也建立了结晶受体结构域的存在。
We examined sub-nanosecond time-scale charge carrier dynamics in crystalline films of a functionalized anthradithiophene (ADT) donor (D) with three different acceptor (A) molecules. A four-fold enhancement in ultrafast charge carrier separation efficiency was observed in D/A blends with a fullerene acceptor added at 7–10 wt. % concentrations, whereas a gradual decrease in peak photocurrent amplitude with acceptor concentration was observed with functionalized pentacene and indenofluorene acceptors. The results were directly correlated with the ADT-tri(ethylsilyl)ethynyl-F donor crystallinity. In the best-performing blends, the presence of crystalline acceptor domains was also established.
影响因子：
8.6
作者：
Dimitrov, Stoichko D.;Durrant, James R.
通讯作者：
Durrant, James R.