High Efficiency Nonfullerene Polymer Solar Cells with Thick Active Layer and Large Area

Bing Guo^a, Wanbin Li^a, Xia Guo^a,*（国霞）, Xiangyi Meng^b, Wei Ma^b, Maojie Zhang^a,*（张茂杰）, and Yongfang Li^a

^a Laboratory of Advanced Optoelectronic Materials College of Chemistry

Chemical Engineering and Materials Science ,Soochow University,Suzhou 215123, China

^b State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049, China

^c Beijing 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 (V_oc) of 0.92 V, a short-circuit current density (J_sc) 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.

链接：http://onlinelibrary.wiley.com/doi/10.1002/adma.201702291/abstract