Highly Efficient Photoelectrochemical Hydrogen Production Using Nontoxic CuIn1.5Se3 Quantum Dots with ZnS/SiO2 Double Overlayers
- Authors
- Kim, Jeehye; Jang, Youn Jeong; Baek, Woonhyuk; Lee, A. Reum; Kim, Jae-Yup; Hyeon, Taeghwan; Lee, Jae Sung
- Issue Date
- Jan-2022
- Publisher
- AMER CHEMICAL SOC
- Keywords
- quantum dots; copper indium selenide; photoelectrochemical water splitting; photoanode; solar hydrogen
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.14, no.1, pp.603 - 610
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 14
- Number
- 1
- Start Page
- 603
- End Page
- 610
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/139820
- DOI
- 10.1021/acsami.1c16976
- ISSN
- 1944-8244
- Abstract
- Quantum dots (QDs) are a promising material for photoelectrochemical (PEC) hydrogen (H-2) production because of their attractive optical properties including high optical absorption coefficient, band-gap tunability, and potential multiple exciton generation. To date, QDs containing toxic elements such as Cd or Pb have been mainly investigated for PEC H-2 production, which cannot be utilized in practice because of the environmental issue. Here, we demonstrate a highly efficient type II heterojunction photoanode of nontoxic CuIn1.5Se3 (CISe) QDs and a mesoporous TiO2 film. In addition, ZnS/SiO2 double overlayers are deposited on the photoanodes to passivate surface defect sites on the CISe QDs, leading to the enhancement of both photocurrent density and photostability. Due to a combination of a wide light absorption range of the CISe QDs and the reduced interfacial charge recombination by the overlayers, a remarkable photocurrent density of 8.5 mA cm(-2) (at 0.5 VRHE) is obtained under 1 sun illumination, which is a record for the PEC sulfite oxidation based on nontoxic QD photoanodes.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 화학공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/139820)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.