High Efficiency Nonfullerene Polymer Solar Cells with Thick Active Layer and Large Area
Bing Guoa, Wanbin Lia, Xia Guoa,*（国霞）, Xiangyi Mengb, Wei Mab, Maojie Zhanga,*（张茂杰）, and Yongfang Lia
aLaboratory of Advanced Optoelectronic Materials College of Chemistry
Chemical Engineering and Materials Science ,Soochow University,Suzhou 215123, China
bState Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049, China
cBeijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190, China
Adv. Mater.2017, 1702291
In this work, high-efficiency nonfullerene polymer solar cells (PSCs) are developed based on a thiazolothiazole-containing wide bandgap polymer PTZ1 as donor and a planar IDT-based narrow bandgap small molecule with four side chains (IDIC) as acceptor. Through thermal annealing treatment, a power conversion efficiency (PCE) of up to 11.5% with an open circuit voltage (Voc) of 0.92 V, a short-circuit current density (Jsc) of 16.4 mA cm−2, and a fill factor of 76.2% is achieved. Furthermore, the PSCs based on PTZ1:IDIC still exhibit a relatively high PCE of 9.6% with the active layer thickness of 210 nm and a superior PCE of 10.5% with the device area of up to 0.81 cm2. These results indicate that PTZ1 is a promising polymer donor material for highly efficient fullerene-free PSCs and large-scale devices fabrication.