Efficient Tandem Organic Photovoltaics with Tunable Rear Sub-cells

被引：75

作者：

Cheng, Pei ^{[1
]}

Liu, Yuqiang ^{[1
,4
]}

Chang, Sheng-Yung ^{[1
]}

Li, Tengfei ^{[2
]}

Sun, Pengyu ^{[1
]}

Wang, Rui ^{[1
]}

Cheng, Hao-Wen ^{[1
,5
]}

Huang, Tianyi ^{[1
]}

Meng, Lei ^{[1
]}

Nuryyeva, Selbi ^{[1
]}

Zhu, Chenhui ^{[3
]}

Wei, Kung-Hwa ^{[5
]}

Sun, Baoquan ^{[4
]}

Zhan, Xiaowei ^{[2
]}

Yang, Yang ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

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

[3] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[4] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China

[5] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Ctr Emergent Funct Matter Sci, Hsinchu 30050, Taiwan

来源：

JOULE | 2019年 / 3卷 / 02期

基金：

美国国家科学基金会;

关键词：

SMALL-MOLECULE ACCEPTOR; POLYMER SOLAR-CELLS; ELECTRON-ACCEPTORS; FULLERENE; DESIGN; MORPHOLOGY; SUBCELLS;

D O I：

10.1016/j.joule.2018.11.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A tandem structure was invented to enhance photon utilization efficiency and reduce thermal loss. Considering the unique advantages of non-fullerene acceptors (NFAs), the combination of NFAs and the tandem concept shows great potential for organic photovoltaics (OPVs). Herein, a simple strategy to balance the voltage-current trade-off in tandem OPVs by employing mixed NFAs in rear sub-cells is reported. The V-OC and J(SC) of rear sub-cells can be tuned by using the blend of donor/NFA/NFA. This strategy offers an easy approach to balance the V-OC and J(SC) in tandem OPVs toward higher power conversion efficiency (PCE) without rational and careful synthesis of new materials. Tandem OPVs based on mixed NFAs in rear sub-cells exhibited the best PCE of 13.3% in the lab. Importantly, the tandem devices were certified by the National Renewable Energy Laboratory (NREL) under asymptotic scans, and a PCE of 11.52% was achieved and recognized on the most recent NREL chart.

引用

页码：432 / 442

页数：11

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