Expanding the absorption and photoresponse of 1D lead–halide perovskites via ultrafast charge transfer

Zhongwei,Chen1; Yang,Liu2; Shaokuan,Gong3; Zixuan,Zhang1; Qinxuan,Cao1; Lingling,Mao2; Xihan,Chen3; Haipeng,Lu1

2022-08-28

10.1063/5.0105878

JOURNAL OF CHEMICAL PHYSICS   影响因子和分区

0021-9606

1089-7690

Low-dimensional metal halide perovskites are attracting extensive attention due to their enhanced quantum confinement and stability compared to three-dimensional perovskites. However, low dimensional connectivity in the inorganic frameworks leads to strongly bounded excitons with limited absorption properties, which impedes their application in photovoltaic devices. Here, we show that, by incorporating a strong electron accepting methylviologen cation, charge transfer (CT) at the organic/inorganic interface can effectively tune the optical properties in one-dimensional (1D) lead-halide perovskites. Both 1D MVPb2I6 and MVPb2Br6 display expanded absorption and photoresponse activity compared to CT inactive cations. The photoinduced CT process in MVPb2I6 was further characterized by transient absorption spectroscopy, which shows an ultrafast CT process within 1 ps, generating charge separated states. Our work unveils the interesting photophysics of these unconventional 1D perovskites with functional organic chromophores. Published under an exclusive license by AIP Publishing.

SCI ; EI

英语

通讯

Department of Chemistry[R9270] ; Research Grants Council of Hong Kong via the Early Career Scheme[26300721] ; National Natural Science Foundation of China[22103034]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000892459700005

AIP Publishing

20223612691546

Absorption spectroscopy ; Chromophores ; Lead compounds ; Metal halides ; Optical properties ; Perovskite ; Perovskite solar cells ; Positive ions

Minerals:482.2 ; Solar Cells:702.3 ; Light/Optics:741.1 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Organic Compounds:804.1

CHEMISTRY

人工提交

1.Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
2.Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
3.SUSTech Energy Institute for Carbon Neutrality, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China

Zhongwei,Chen,Yang,Liu,Shaokuan,Gong,等. Expanding the absorption and photoresponse of 1D lead–halide perovskites via ultrafast charge transfer[J]. JOURNAL OF CHEMICAL PHYSICS,2022,157(8):084705.

Zhongwei,Chen.,Yang,Liu.,Shaokuan,Gong.,Zixuan,Zhang.,Qinxuan,Cao.,...&Haipeng,Lu.(2022).Expanding the absorption and photoresponse of 1D lead–halide perovskites via ultrafast charge transfer.JOURNAL OF CHEMICAL PHYSICS,157(8),084705.

Zhongwei,Chen,et al."Expanding the absorption and photoresponse of 1D lead–halide perovskites via ultrafast charge transfer".JOURNAL OF CHEMICAL PHYSICS 157.8(2022):084705.