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SCI Article

Ag(I)-Thiolate-Protected Silver Nanoclusters for Solar Cells: Electrochemical and Spectroscopic Look into the Photoelectrode/Electrolyte Interface

	성명	방진호 ()
	소속	대학원 바이오나노학과
	캠퍼스
	우수선정주	2019년 04월 3째주

Author

Abbas, Muhammad A. (Nanosensor Res Inst); Bang, Jin Ho (Nanosensor Res Inst); Lee, Junghyun (Dept Bionano Technol); 방진호 (Dept Bionano Technol) corresponding author; Bang, Jin Ho (Dept Chem & Mol Engn);

Corresponding Author Info

Bang, JH (reprint author), Hanyang Univ, Nanosensor Res Inst, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea.; Kamat, PV (reprint author), Univ Notre Dame, Notre Dame Radiat Lab, Notre Dame, IN 46556 USA.; Kamat, PV (reprint author), Univ Notr

E-mail

jbang@hanyang.ac.kr

Document Type

Article

Source

ACS APPLIED MATERIALS & INTERFACES Volume:11 Issue:13 Pages:12492-12503 Published:2019

Times Cited

External Information

http://dx.doi.org/10.1021/acsami.9b00049

Abstract

Intrinsic low stability and short excited lifetimes associated with Ag nanoclusters (NCs) are major hurdles that have prevented the full utilization of the many advantages of Ag NCs over their longtime contender, Au NCs, in light energy conversion systems. In this report, we diagnosed the problems of conventional thiolated Ag NCs used for solar cell applications and developed a new synthesis route to form aggregation-induced emission (AIE)-type Ag NCs that can significantly overcome these limitations. A series of Ag(0)/Ag(I)-thiolate core/shell-structured NCs with different core sizes were explored for photoelectrodes, and the nature of the two important interfacial events occurring in Ag NC-sensitized solar cells (photoinduced electron transfer and charge recombination) were unveiled by in-depth spectroscopic and electrochemical analyses. This work reveals that the subtle interplay between the light absorbing capability, charge separation dynamics, and charge recombination kinetics in the photoelectrode dictates the solar cell performance. In addition, we demonstrate significant improvement in the photocurrent stability and light conversion efficiency that have not been achieved previously. Our comprehensive understanding of the critical parameters that limit the light conversion efficiency lays a foundation on which new principles for designing Ag NCs for efficient light energy conversion can be built.

Web of Science Categories

Nanoscience & Nanotechnology; Materials Science, Multidisciplinary

Funding

Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2016R1A1A1A05005038, NRF-2018R1E1A2A02086254, NRF-2018M3D1A1089380]; Ministry of Education [NRF-2018R1A6A1A03024231]; Division of Che

Language

English

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