Dopant‐Free Hole Transporting Polymers for High Efficiency, Environmentally Stable Perovskite Solar Cells

Liao, Hsueh‐Chung; Tam, Teck Lip Dexter; Guo, Peijun; Wu, Yilei; Manley, Eric F.; Huang, Wei; Zhou, Nanjia; Soe, Chan Myae Myae; Wang, Binghao; Wasielewski, Michael R.; Chen, Lin X.; Kanatzidis, Mercouri G.; Facchetti, Antonio; Chang, Robert P. H.; Marks, Tobin J.

doi:10.1002/aenm.201600502

Dopant‐Free Hole Transporting Polymers for High Efficiency, Environmentally Stable Perovskite Solar Cells

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.201600502· OSTI ID:1401444

Liao, Hsueh‐Chung ^[1]; Tam, Teck Lip Dexter ^[2]; Guo, Peijun ^[3]; Wu, Yilei ^[4]; Manley, Eric F. ^[5]; Huang, Wei ^[6]; Zhou, Nanjia ^[3]; Soe, Chan Myae Myae ^[7]; Wang, Binghao ^[6]; Wasielewski, Michael R. ^[7]; Chen, Lin X. ^[8]; Kanatzidis, Mercouri G. ^[7]; Facchetti, Antonio ^[9]; Chang, Robert P. H. ^[4]; Marks, Tobin J. ^[7]

Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA, Department of Chemistry Northwestern University Evanston IL 60208 USA, Argonne‐Northwestern Solar Energy Research Center Northwestern University Evanston IL 60208 USA
Department of Chemistry Northwestern University Evanston IL 60208 USA, Institute of Materials Research and Engineering (IMRE) Agency of Science, Technology and Research (A*STAR) Fusionopolis Way, Innovis, #08‐03 Singapore 138634 Singapore
Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA, Argonne‐Northwestern Solar Energy Research Center Northwestern University Evanston IL 60208 USA
Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA
Department of Chemistry Northwestern University Evanston IL 60208 USA, Chemical Sciences and Engineering Division Argonne National Laboratory 9700 S. Cass Ave. Lemont IL 60439 USA
Department of Chemistry Northwestern University Evanston IL 60208 USA
Department of Chemistry Northwestern University Evanston IL 60208 USA, Argonne‐Northwestern Solar Energy Research Center Northwestern University Evanston IL 60208 USA
Department of Chemistry Northwestern University Evanston IL 60208 USA, Argonne‐Northwestern Solar Energy Research Center Northwestern University Evanston IL 60208 USA, Chemical Sciences and Engineering Division Argonne National Laboratory 9700 S. Cass Ave. Lemont IL 60439 USA
Department of Chemistry Northwestern University Evanston IL 60208 USA, Polyera Corporation Skokie IL 60077 USA

Over the past five years, a rapid progress in organometal‐halide perovskite solar cells has greatly influenced emerging solar energy science and technology. In perovksite solar cells, the overlying hole transporting material (HTM) is critical for achieving high power conversion efficiencies (PCEs) and for protecting the air‐sensitive perovskite active layer. This study reports the synthesis and implementation of a new polymeric HTM series based on semiconducting 4,8‐dithien‐2‐yl‐benzo[1,2‐ d ;4,5‐ d ′]bistriazole‐ alt ‐benzo[1,2‐ b :4,5‐ b ′]dithiophenes (pBBTa‐BDTs), yielding high PCEs and environmentally‐stable perovskite cells. These intrinsic (dopant‐free) HTMs achieve a stabilized PCE of 12.3% in simple planar heterojunction cells—the highest value to date for a polymeric intrinsic HTM. This high performance is attributed to efficient hole extraction/collection (the most efficient pBBTa‐BDT is highly ordered and orients π‐face‐down on the perovskite surface) and balanced electron/hole transport. The smooth, conformal polymer coatings suppress aerobic perovskite film degradation, significantly enhancing the solar cell 85 °C/65% RH PCE stability versus typical molecular HTMs.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1401444

Alternate ID(s):: OSTI ID: 1333949

Journal Information:: Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 16 Vol. 6; ISSN 1614-6832

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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