TY - JOUR
T1 - Efficiency exceeding 20% in perovskite solar cells with side-chain liquid crystalline polymer–doped perovskite absorbers
AU - Arivunithi, Veera Murugan
AU - Reddy, Saripally Sudhaker
AU - Sree, Vijaya Gopalan
AU - Park, Ho-Yeol
AU - Park, Juuyn
AU - Kang, Yong-Cheol
AU - Shin, Eun-Sol
AU - Noh, Yong-Young
AU - Song, Myungkwan
AU - Jin, Sung Ho
N1 - Funding Information:
V.M.A. and S.S.R. contributed equally to this work. This work was supported by the National Research Foundation (Grant Nos. NRF-2016R1E1A1A01942593, NRF-2018R1A5A1025594) of the Ministry of Science and ICT.
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/10/25
Y1 - 2018/10/25
N2 - Attaining high quality perovskite films with enhanced morphology, high efficiency, and better stability is a great research challenge. Here, a side-chain liquid crystalline polymer (SCLCP) is incorporated as a dopant into the perovskite film to achieve perovskite solar cells (PSCs) with high efficiency and long-term stability. SCLCP doping increases the grain size in the crystalline perovskite film by controlled solvent evaporation and reduced grain boundaries, which slow the material degradation and reduce the charge recombination. Using this approach, the PSC power conversion efficiency (PCE) is significantly boosted from 18.0% (nondoped) to 20.63% for the SCLCP-doped perovskite film with much improved air stability. Furthermore, the trap state density in the SCLCP-doped films is decreased because the SCLCP effectively passivates the perovskite grain surface. Notably, the SCLCP appears to act as a bridge between grains for effective charge transfer from perovskite toward the electrode, which would partially explain the enhanced efficiency and stability.
AB - Attaining high quality perovskite films with enhanced morphology, high efficiency, and better stability is a great research challenge. Here, a side-chain liquid crystalline polymer (SCLCP) is incorporated as a dopant into the perovskite film to achieve perovskite solar cells (PSCs) with high efficiency and long-term stability. SCLCP doping increases the grain size in the crystalline perovskite film by controlled solvent evaporation and reduced grain boundaries, which slow the material degradation and reduce the charge recombination. Using this approach, the PSC power conversion efficiency (PCE) is significantly boosted from 18.0% (nondoped) to 20.63% for the SCLCP-doped perovskite film with much improved air stability. Furthermore, the trap state density in the SCLCP-doped films is decreased because the SCLCP effectively passivates the perovskite grain surface. Notably, the SCLCP appears to act as a bridge between grains for effective charge transfer from perovskite toward the electrode, which would partially explain the enhanced efficiency and stability.
KW - high efficiency
KW - passivation
KW - perovskite solar cells
KW - side-chain liquid crystalline polymers
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=85053054236&partnerID=8YFLogxK
U2 - 10.1002/aenm.201801637
DO - 10.1002/aenm.201801637
M3 - Article
AN - SCOPUS:85053054236
SN - 1614-6832
VL - 8
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 30
M1 - 1801637
ER -