Efficient Quaternary Organic Solar Cells with Parallel-Alloy Morphology

被引：68

作者：

Bi, Zhaozhao ^{[1
]}

Zhu, Qinglian ^{[1
]}

Xu, Xianbin ^{[1
]}

Naveed, Hafiz Bilal ^{[1
]}

Sui, Xinyu ^{[2
]}

Xin, Jingming ^{[1
]}

Zhang, Lin ^{[1
]}

Li, Tengfei ^{[3
]}

Zhou, Ke ^{[1
]}

Liu, Xinfeng ^{[2
]}

Zhan, Xiaowei ^{[3
]}

Ma, Wei ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

[2] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Standardizat & Measurement Nanotechno, Div Nanophoton, Beijing 100191, Peoples R China

[3] Peking Univ, Minist Educ, Key Lab Polymer Chem & Phys, Coll Engn,Dept Mat Sci & Engn, Beijing 100871, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2019年 / 29卷 / 09期

基金：

中国博士后科学基金;

关键词：

alloyed acceptors; morphology; non-fullerene; parallel donors; quaternary organic solar cells; OPEN-CIRCUIT VOLTAGE; FILL FACTOR; ENERGY-TRANSFER; POLYMER; ACCEPTOR; ORIENTATION; MICROSTRUCTURE; RECOMBINATION; PHOTOVOLTAICS; ENHANCEMENT;

D O I：

10.1002/adfm.201806804

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two compatible donors (PBDB-T and PTB7-Th) and two miscible acceptors (ITIC and FOIC) are employed to deliver a parallel-alloy morphology model in non-fullerene-based quaternary organic solar cells. PBDB-T and PTB7-Th form a parallel link with a slight adjustment of molecular packing into enhanced face-on crystallites while ITIC disperses into discontinuous FOIC microcrystal regions to form continuous and ordered alloy-like acceptor phases. Characterization of blend morphology highlights the parallel-alloy model-enabled by the introduction of PBDB-T and ITIC, which contributes to improved molecular packing and reduced domain size resulting in efficient charge generation and consistent transport channels. This successful parallel-alloy quaternary blend morphology demonstrates an enhanced optical absorption, optimized domain size, and nanostructures toward simultaneous improvement in charge transfer and transport. Therefore, a power conversion efficiency of 12.52% is realized for a quaternary device which is 6% higher than the ternary device (PBDB-T:PTB7-Th:FOIC) and 12% higher than the binary device (PTB7-Th:FOIC). Domination of quaternary devices over ternary and binary blends, which is another feasible way to realize highly efficient devices through further investigation of quaternary OSCs, is presented.

引用

页数：10

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