In Situ Structure Characterization in Slot-Die-Printed All-Polymer Solar Cells with Efficiency Over 9%

Zhong, Wenkai; Hu, Qin; Jiang, Yufeng; Li, Yu; Chen, Teresa L.; Ying, Lei; Liu, Feng; Wang, Cheng; Liu, Yi; Huang, Fei; Cao, Yong; Russell, Thomas P.

doi:10.1002/solr.201900032

In Situ Structure Characterization in Slot-Die-Printed All-Polymer Solar Cells with Efficiency Over 9%

Journal Article · Mon Apr 01 00:00:00 EDT 2019 · Solar RRL

DOI:https://doi.org/10.1002/solr.201900032· OSTI ID:1599802

Zhong, Wenkai ^[1]; Hu, Qin ^[2]; Jiang, Yufeng ^[3]; Li, Yu ^[4]; Chen, Teresa L. ^[3]; Ying, Lei ^[5]; Liu, Feng ^[6]; Wang, Cheng ^[7]; Liu, Yi ^[3]; Huang, Fei ^[5]; Cao, Yong ^[5]; ^[2]

South China Univ. of Technology, Guangzhou (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Massachusetts, Amherst, MA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Shanghai Jiao Tong Univ. (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
South China Univ. of Technology, Guangzhou (China)
Shanghai Jiao Tong Univ. (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Herein, high-performance printed all-polymer solar cells (all-PSCs) based on a bulk-heterojunction (BHJ) blend film are demonstrated using PTzBI as the donor and N2200 as the acceptor. A slot-die process is used to prepare the BHJ blend, which is a cost-effective, high-throughput approach to achieve large-area photovoltaic devices. The real-time crystallization of polymers in the film drying process is investigated by in situ grazing incidence wide-angle X-ray scattering characterization. Printing is found to significantly improve the crystallinity of the polymer blend in comparison with spin coating. Moreover, printing with 1,8-diiodooctane as the solvent additive enhances the polymer aggregation and crystallization during solvent evaporation, eventually leading to multi-length-scale phase separation, with PTzBI-rich domains in-between the N2200 crystalline fibers. This unique morphology achieved by printing fabrication results in an impressively high power conversion efficiency of 9.10%, which is the highest efficiency reported for printed all-PSCs. Finally, these findings provide important guidelines for controlling film drying dynamics for processing all-PSCs.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NNSFC); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1599802

Journal Information:: Solar RRL, Journal Name: Solar RRL Journal Issue: 7 Vol. 3; ISSN 2367-198X

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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