TY - JOUR
T1 - Efficient Naphthalene Imide-Based Interface Engineering Materials for Enhancing Perovskite Photovoltaic Performance and Stability
AU - Wang, Helin
AU - Guo, Yu
AU - He, Lanlan
AU - Kloo, Lars
AU - Song, Jun
AU - Qu, Junle
AU - Qian, Peng Cheng
AU - Wong, Wai Yeung
N1 - Funding Information:
J.Q. would like to acknowledge the National Key R&D Program of China (2018YFC0910602). J.S. would like to gratefully acknowledge the (Key) Project of Department of Education of Guangdong Province (2016KCXTD007). W.-Y.W. would like to acknowledge supports from the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20180507183413211); the National Natural Science Foundation of China (51873176); the Hong Kong Research Grants Council (PolyU 123384/16P, C5037-18G); the Hong Kong Polytechnic University (1-ZE1C, 847S) for the financial support. J.Q. would like to gratefully thank the National Natural Science Foundation of China (61775145, 61525503, 61620106016, 61835009). The Swedish Research Council and Stiftelsen Olle Eriksson Byggmästare are also acknowledged for their support. P.-C.Q. thanks to the Foundation of Wenzhou Science & Technology Bureau (no. W20170003) and the National Natural Science Foundation of China (no. 21828102) for the support.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/9/16
Y1 - 2020/9/16
N2 - The ways to overcome surface charge recombination and poor interface contact are still the central challenges for the development of inorganic-organic hybrid halide perovskite solar cells (PSCs). [6,6]-Phenyl C61 butyric acid methyl ester (PCBM) is commonly employed in PSCs, but it has some disadvantages including high charge recombination and poor surface coverage. Therefore, the addition of an interfacial engineering layer showing efficient surface passivation, electron extraction, and excellent interface contact can solve the above problems. Furthermore, by employing interface engineering with a spike structure of the energy levels, the reduced energy losses are beneficial to elevating the open-circuit voltage (Voc) in PSCs. Herein, the linear naphthalene imide dimer containing an indacenodithiophene unit (IDTT2NPI) has been developed as an excellent interface engineering material to strengthen the perovskite performance. The introduction of a spike interface on the top of a methylammonium lead triiodide (MAPbI3) film resulted in a high Voc of 1.12 V with the optimal efficiency reaching 20.2%. The efficiency enhancement can be traced to the efficient surface passivation and enhanced interface contact. The mechanism of IDTT2NPI as the interface engineering layer was investigated by both experiments and theoretical calculations. This work provides a promising naphthalene imide-based interfacial material for high-efficiency and stable PSCs.
AB - The ways to overcome surface charge recombination and poor interface contact are still the central challenges for the development of inorganic-organic hybrid halide perovskite solar cells (PSCs). [6,6]-Phenyl C61 butyric acid methyl ester (PCBM) is commonly employed in PSCs, but it has some disadvantages including high charge recombination and poor surface coverage. Therefore, the addition of an interfacial engineering layer showing efficient surface passivation, electron extraction, and excellent interface contact can solve the above problems. Furthermore, by employing interface engineering with a spike structure of the energy levels, the reduced energy losses are beneficial to elevating the open-circuit voltage (Voc) in PSCs. Herein, the linear naphthalene imide dimer containing an indacenodithiophene unit (IDTT2NPI) has been developed as an excellent interface engineering material to strengthen the perovskite performance. The introduction of a spike interface on the top of a methylammonium lead triiodide (MAPbI3) film resulted in a high Voc of 1.12 V with the optimal efficiency reaching 20.2%. The efficiency enhancement can be traced to the efficient surface passivation and enhanced interface contact. The mechanism of IDTT2NPI as the interface engineering layer was investigated by both experiments and theoretical calculations. This work provides a promising naphthalene imide-based interfacial material for high-efficiency and stable PSCs.
KW - interface engineering
KW - naphthalene imide
KW - perovskite solar cell
KW - surface passivation
KW - theoretical calculation
UR - http://www.scopus.com/inward/record.url?scp=85091191846&partnerID=8YFLogxK
U2 - 10.1021/acsami.0c11620
DO - 10.1021/acsami.0c11620
M3 - Journal article
C2 - 32812425
AN - SCOPUS:85091191846
SN - 1944-8244
VL - 12
SP - 42348
EP - 42356
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 37
ER -