Ternary blend all-polymer solar cells: enhanced performance and evidence of parallel-like bulk heterojunction mechanism
Ternary blend all-polymer solar cells: enhanced performance and evidence of parallel-like bulk heterojunction mechanism
复制标题
DOI：
10.1557/mrc.2015.36
复制
发表时间：
2015-06
影响因子：
1.9
通讯作者：
Y. Hwang;Brett A. E. Courtright;S. Jenekhe
中科院分区：
文献类型：
--
作者：
Y. Hwang;Brett A. E. Courtright;S. Jenekhe
由给体聚[4，8-bis]二元共混物构成的全聚合物太阳能电池（5-（2-乙基己基）噻吩-2-基）苯并[1，2-B; 4，5-B′]二噻吩-2，6-二基-alt-（4-（2-乙基己酰基）-噻吩并[3，4-B]噻吩-）-2-6-二基）]（PBDTTT-CT），和受体聚合物萘二酰亚胺-硒醚共聚物PNDIS-HD和PPDIS的能量转换效率分别为1.3%和2.1%。由75wt%PPDIS的[PBDTTT-CT][PNDIS-HD]1-x[PPDIS]x组成的三元共混物太阳能电池具有3.2%的PCE，与二元共混物器件相比，其提高了约50%-140%。除其他结果外，三元共混物短路电流与二元共混物装置的短路电流之和的相等提供了三元共混物太阳能电池中的平行状本体异质结机制的证据。这些结果提供了三元共混物全聚合物太阳能电池中增强性能的第一个例子。
All-polymer solar cells composed of binary blends of donor poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6- diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene-)-2–6-diyl)] (PBDTTT-CT ), and acceptor polymers naphthalene diimide-selenophene copolymer (PNDIS-HD) and perylene diimide-selenophene copolymer (PPDIS) had power conversion efficiencies (PCEs) of 1.3 and 2.1%, respectively. Ternary blend solar cells composed of [PBDTTT-CT][PNDIS-HD]1−x[PPDIS]x at 75 wt% PPDIS had a PCE of 3.2%, which is about a 50%–140% enhancement compared with the binary blend devices. Equality of the ternary blend short-circuit current to the sum of those of the binary blend devices, among other results, provided evidence of a parallel-like bulk heterojunction mechanism in the ternary blend solar cells. These results provide the first example of enhanced performance in ternary blend all-polymer solar cells.