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  • Yao, ZhaoyangKTH,Organisk kemi (author)

Conformational and Compositional Tuning of Phenanthrocarbazole-Based Dopant-Free Hole-Transport Polymers Boosting the Performance of Perovskite Solar Cells

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-09-14
  • American Chemical Society (ACS),2020
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-285623
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285623URI
  • https://doi.org/10.1021/jacs.0c08352DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20201110
  • Conjugated polymers are regarded as promising candidates for dopant-free hole-transport materials (HTMs) in efficient and stable perovskite solar cells (PSCs). Thus far, the vast majority of polymeric HTMs feature structurally complicated benzo[1,2-b:4,5-b']dithiophene (BDT) analogs and electron-withdrawing heterocycles, forming a strong donor-acceptor (D-A) structure. Herein, a new class of phenanthrocarbazole (PC)-based polymeric HTMs (PC1, PC2, and PC3) has been synthesized by inserting a PC unit into a polymeric thiophene or selenophene chain with the aim of enhancing the pi-pi stacking of adjacent polymer chains and also to efficiently interact with the perovskite surface through the broad and planar conjugated backbone of the PC. Suitable energy levels, excellent thermostability, and humidity resistivity together with remarkable photoelectric properties are obtained via meticulously tuning the conformation and elemental composition of the polymers. As a result, PSCs containing PC3 as dopant-free HTM show a stabilized power conversion efficiency (PCE) of 20.8% and significantly enhanced longevity, rendering one of the best types of PSCs based on dopant-free HTMs. Subsequent experimental and theoretical studies reveal that the planar conformation of the polymers contributes to an ordered and face-on stacking of the polymer chains. Furthermore, introduction of the "Lewis soft" selenium atom can passivate surface trap sites of perovskite films by Pb-Se interaction and facilitate the interfacial charge separation significantly. This work reveals the guiding principles for rational design of dopant-free polymeric HTMs and also inspires rational exploration of small molecular HTMs.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Zhang, FuguoKTH,Organisk kemi(Swepub:kth)u1dddr0z (author)
  • Guo, YaxiaoKTH,Organisk kemi(Swepub:kth)u12jvnds (author)
  • Wu, HengZhejiang Univ, Dept Chem, Hangzhou 310028, Peoples R China. (author)
  • He, LanlanKTH,Tillämpad fysikalisk kemi(Swepub:kth)u183vulk (author)
  • Liu, ZhouShanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China. (author)
  • Cai, BinDalian Univ Technol DUT, DUT KTH Joint Educ & Res Ctr Mol Devices, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China. (author)
  • Guo, YuKTH,Tillämpad fysikalisk kemi(Swepub:kth)u140q4oh (author)
  • Brett, CalvinKTH,Teknisk mekanik,Wallenberg Wood Science Center,DESY, D-22607 Hamburg, Germany.;KTH Royal Inst Technol, Dept Engn Mech, S-10044 Stockholm, Sweden.(Swepub:kth)u1sadquq (author)
  • Li, YuanyuanKTH,Wallenberg Wood Science Center,Fiber- och polymerteknologi(Swepub:kth)u1bpdtr4 (author)
  • Venugopal Srambickal, ChinmayaKTH,Tillämpad fysik,Expt Biomol Phys(Swepub:kth)u16g2zu1 (author)
  • Yang, XichuanDalian Univ Technol DUT, DUT KTH Joint Educ & Res Ctr Mol Devices, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China. (author)
  • Chen, GangShanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China. (author)
  • Widengren, JerkerKTH,Kvant- och biofotonik,Expt Biomol Phys(Swepub:kth)u1i3g09c (author)
  • Liu, DianyiWestlake Univ, Sch Engn, Hangzhou 310024, Peoples R China. (author)
  • Gardner, James M.,1982-KTH,Tillämpad fysikalisk kemi(Swepub:kth)u1r55ysm (author)
  • Kloo, LarsKTH,Tillämpad fysikalisk kemi(Swepub:kth)u1jrdr1m (author)
  • Sun, Licheng,1962-KTH,Organisk kemi,Dalian Univ Technol DUT, DUT KTH Joint Educ & Res Ctr Mol Devices, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China.;Westlake Univ, Ctr Artificial Photosynth Solar Fuels, Sch Sci, Hangzhou 310024, Peoples R China.(Swepub:kth)u1umfd9h (author)
  • KTHOrganisk kemi (creator_code:org_t)

Related titles

  • In:Journal of the American Chemical Society: American Chemical Society (ACS)142:41, s. 17681-176920002-78631520-5126

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