Surface energetics mediated charge transfer and exciton transfer in cation-adsorbed rubrene/PbS nanocrystal hybrids

Qiao，Jia Wei1; Chen，Zhi Hao1; Liu，He Yuan2; Li，Xi You2; Guo，Jia Jia3; Qin，Chao Chao3; Wang，Xingzhu4; Pu，Yong Jin5; Hao，Xiao Tao1,6

2022-10-01

10.1088/2515-7655/ac9807

Journal of Physics-Energy   Impact Factor & Quartile

2515-7655

2515-7655

Organic molecule and inorganic nanocrystal (NC) hybrids have become a promising platform for photon energy conversion. Although surface energetics modification has proven effective in promoting triplet energy transfer, singlet energy transfer and charge transfer have been barely investigated. Here, we systematically clarify the photophysical dynamics of charge, singlet exciton, and triplet exciton within the energy conversion process based on hybrids of rubrene and Cd-adsorbed PbS NCs. It is found that a considerable number of charges in rubrene molecules can be transferred to cation-induced surface states in the ∼2 ps time scale with high efficiency to trigger a delayed biexciton effect, which provides a novel approach to uncover the intermediate role of NC surface states. For the triplet exciton, strong interaction with surface states is investigated with a recycling energy transfer of around 14% efficiency, which is found to be insensitive to changes in NC surface energetics. As a result, the maximum photoluminescence lifetime of PbS NCs was enhanced by about 38%. This work reveals the neglected photo-physical dynamics in the transfer process between organic molecules/inorganic NCs and validates the capability of the surface state in sensitization of organic charges and excitons.

biexciton effect inorganic nanocrystals singlet fission transient absorption triplet energy transfer

SCI ; EI

English

Others

National Natural Science Foundation of China[11774204] ; Major Program of the Natural Science Foundation of Shandong Province[ZR2019ZD43] ; ARC Centre of Excellence in Exciton Science[CE170100026]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000876703300001

IOP Publishing Ltd

20224613113458

Cadmium compounds ; Charge transfer ; Energy conversion ; Energy transfer ; Excitons ; IV-VI semiconductors ; Lead compounds ; Molecules ; Nanocrystals ; Positive ions

Energy Conversion Issues:525.5 ; Semiconducting Materials:712.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Classical Physics; Quantum Theory; Relativity:931 ; Atomic and Molecular Physics:931.3 ; High Energy Physics; Nuclear Physics; Plasma Physics:932 ; Crystalline Solids:933.1

2-s2.0-85141694668

Scopus

1.School of Physics,State Key Laboratory of Crystal Materials,Shandong University,Jinan,Shandong,250100,China
2.School of Materials Science and Engineering,Institute of New Energy,China University of Petroleum (East China),Qingdao,Shandong,266580,China
3.College of Physics and Materials Science,Henan Normal University,Xinxiang,Henan,453007,China
4.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
5.RIKEN Center for Emergent Matter Science (CEMS),Saitama,2-1 Hirosawa Wako,351-0198,Japan
6.ARC Centre of Excellence in Exciton Science,School of Chemistry,The University of Melbourne,Parkville,3010,Australia

Qiao，Jia Wei,Chen，Zhi Hao,Liu，He Yuan,et al. Surface energetics mediated charge transfer and exciton transfer in cation-adsorbed rubrene/PbS nanocrystal hybrids[J]. Journal of Physics-Energy,2022,4(4).

Qiao，Jia Wei.,Chen，Zhi Hao.,Liu，He Yuan.,Li，Xi You.,Guo，Jia Jia.,...&Hao，Xiao Tao.(2022).Surface energetics mediated charge transfer and exciton transfer in cation-adsorbed rubrene/PbS nanocrystal hybrids.Journal of Physics-Energy,4(4).

Qiao，Jia Wei,et al."Surface energetics mediated charge transfer and exciton transfer in cation-adsorbed rubrene/PbS nanocrystal hybrids".Journal of Physics-Energy 4.4(2022).