Organic Monomolecular Layers Enable Energy-Level Matching for Efficient Hole Transporting Layer Free Inverted Perovskite Solar Cells

Kong, Weiguang1,2,3; Li, Wang1; Liu, Chanwen1; Liu, Hui1; Miao, Jun1; Wang, Weijun1; Chen, Shi1; Hu, Manman1; Li, Dedi1; Amini, Abbas4,5; Yang, Shaopeng2; Wang, Jianbo3; Xu, Baomin1; Cheng, Chun1

2019-02

10.1021/acsnano.8b07627

ACS Nano   影响因子和分区

1936-0851

1936-086X

High-efficiency hole transport layer free perovskite solar cells (HTL-free PSCs) with economical and simplified device structure can greatly facilitate the commercialization of PSCs. However, eliminating the key HTL in PSCs results usually in a severe efficiency loss and poor carrier transfer due to the energy-level mismatching at the indium tin oxide (ITO)/perovskite interface. In this study, we solve this issue by introducing an organic monomolecular layer (ML) to raise the effective work function of ITO with the assistance of an interface dipole created by Sn-N bonds. The energy-level alignment at the ITO/perovskite interface is optimized with a barrier-free contact, which favors efficient charge transfer and suppressed nonradiative carrier recombination. The HTL-free PSCs based on the ML-modified ITO yield an efficiency of 19.4%, much higher than those of HTL-free PSCs on bare ITO (10.26%), comparable to state-of-the-art PSCs with a HTL. This study provides an in-depth understanding of the mechanism of interfacial energy-level alignment and facilitates the design of advanced interfacial materials for simplified and efficient PSC devices.

solar cells monomolecular layers interface dipole energy-level alignment interface recombination

SCI ; EI

英语

NI期刊

第一 ; 通讯

Guangdong Hong Kong joint innovation project[2016A050503012]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000460199400063

AMER CHEMICAL SOC

20190506456048

Alignment ; Charge transfer ; Hole mobility ; Monolayers ; Perovskite ; Perovskite solar cells ; Solar cells ; Tin oxides

Minerals:482.2 ; Mechanical Devices:601.1 ; Solar Cells:702.3 ; Semiconducting Materials:712.1 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat Mat, Natl Local Joint Engn Lab New Energy Photoelect D, Baoding 071002, Peoples R China
3.Wuhan Univ, Dept Phys, Wuhan 430072, Hubei, Peoples R China
4.Western Sydney Univ, Ctr Infrastruct Engn, Kingswood, NSW 2751, Australia
5.Australian Coll Kuwait, Dept Mech Engn, Mishref, Kuwait

Kong, Weiguang,Li, Wang,Liu, Chanwen,et al. Organic Monomolecular Layers Enable Energy-Level Matching for Efficient Hole Transporting Layer Free Inverted Perovskite Solar Cells[J]. ACS Nano,2019,13(2):1625-1634.

Kong, Weiguang.,Li, Wang.,Liu, Chanwen.,Liu, Hui.,Miao, Jun.,...&Cheng, Chun.(2019).Organic Monomolecular Layers Enable Energy-Level Matching for Efficient Hole Transporting Layer Free Inverted Perovskite Solar Cells.ACS Nano,13(2),1625-1634.

Kong, Weiguang,et al."Organic Monomolecular Layers Enable Energy-Level Matching for Efficient Hole Transporting Layer Free Inverted Perovskite Solar Cells".ACS Nano 13.2(2019):1625-1634.