Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals

Wonjoo Lee; Woo Chul Kwak; Sun Ki Min; Jung Chul Lee; Won Seok Chae; Yun Mo Sung; Sung Hwan Han

doi:10.1016/j.elecom.2008.08.025

Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals

Wonjoo Lee, Woo Chul Kwak, Sun Ki Min, Jung Chul Lee, Won Seok Chae, Yun Mo Sung, Sung Hwan Han

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

72 Citations (Scopus)

Abstract

In order to absorb a broad spectrum in visible region, a co-sensitized TiO₂ electrode was prepared by CdSe and Mg-doped CdSe quantum dots (Q dots). The power conversion efficiency of the co-sensitized Q dots photoelectrochemical solar cells (PECs) showed 1.03% under air mass 1.5 condition (I = 100 mW/cm²), which is higher than that of individual Q dots-sensitized PECs. The incident-photon-to-current conversion efficiency of the co-sensitized PECs showed absorption peaks at 541 and 578 nm corresponding to the two Q dots and displayed a broad spectral response over the entire visible spectrum in the 500-600 nm wavelength domains.

Original language	English
Pages (from-to)	1699-1702
Number of pages	4
Journal	Electrochemistry Communications
Volume	10
Issue number	11
DOIs	https://doi.org/10.1016/j.elecom.2008.08.025
Publication status	Published - 2008 Nov

Keywords

CdSe
Co-sensitization
Photoelectrochemical cells
Quantum dots-sensitized solar cells
Spectral broadening

ASJC Scopus subject areas

Electrochemistry

Access to Document

10.1016/j.elecom.2008.08.025

Cite this

@article{32f3a686839143448aceb093e0599da9,

title = "Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals",

abstract = "In order to absorb a broad spectrum in visible region, a co-sensitized TiO2 electrode was prepared by CdSe and Mg-doped CdSe quantum dots (Q dots). The power conversion efficiency of the co-sensitized Q dots photoelectrochemical solar cells (PECs) showed 1.03% under air mass 1.5 condition (I = 100 mW/cm2), which is higher than that of individual Q dots-sensitized PECs. The incident-photon-to-current conversion efficiency of the co-sensitized PECs showed absorption peaks at 541 and 578 nm corresponding to the two Q dots and displayed a broad spectral response over the entire visible spectrum in the 500-600 nm wavelength domains.",

keywords = "CdSe, Co-sensitization, Photoelectrochemical cells, Quantum dots-sensitized solar cells, Spectral broadening",

author = "Wonjoo Lee and Kwak, {Woo Chul} and Min, {Sun Ki} and Lee, {Jung Chul} and Chae, {Won Seok} and Sung, {Yun Mo} and Han, {Sung Hwan}",

note = "Funding Information: This research was supported by Nano R&D program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (M1080300131008M 030031010). Funding Information: This work was also supported by the Korean Israeli Science Sharing (KISS) Program funded by the MSET in 2007. The authors wish to thank Brain Korea 21 for financial support.",

year = "2008",

month = nov,

doi = "10.1016/j.elecom.2008.08.025",

language = "English",

volume = "10",

pages = "1699--1702",

journal = "Electrochemistry Communications",

issn = "1388-2481",

publisher = "Elsevier Inc.",

number = "11",

}

TY - JOUR

T1 - Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals

AU - Lee, Wonjoo

AU - Kwak, Woo Chul

AU - Min, Sun Ki

AU - Lee, Jung Chul

AU - Chae, Won Seok

AU - Sung, Yun Mo

AU - Han, Sung Hwan

N1 - Funding Information: This research was supported by Nano R&D program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (M1080300131008M 030031010). Funding Information: This work was also supported by the Korean Israeli Science Sharing (KISS) Program funded by the MSET in 2007. The authors wish to thank Brain Korea 21 for financial support.

PY - 2008/11

Y1 - 2008/11

N2 - In order to absorb a broad spectrum in visible region, a co-sensitized TiO2 electrode was prepared by CdSe and Mg-doped CdSe quantum dots (Q dots). The power conversion efficiency of the co-sensitized Q dots photoelectrochemical solar cells (PECs) showed 1.03% under air mass 1.5 condition (I = 100 mW/cm2), which is higher than that of individual Q dots-sensitized PECs. The incident-photon-to-current conversion efficiency of the co-sensitized PECs showed absorption peaks at 541 and 578 nm corresponding to the two Q dots and displayed a broad spectral response over the entire visible spectrum in the 500-600 nm wavelength domains.

AB - In order to absorb a broad spectrum in visible region, a co-sensitized TiO2 electrode was prepared by CdSe and Mg-doped CdSe quantum dots (Q dots). The power conversion efficiency of the co-sensitized Q dots photoelectrochemical solar cells (PECs) showed 1.03% under air mass 1.5 condition (I = 100 mW/cm2), which is higher than that of individual Q dots-sensitized PECs. The incident-photon-to-current conversion efficiency of the co-sensitized PECs showed absorption peaks at 541 and 578 nm corresponding to the two Q dots and displayed a broad spectral response over the entire visible spectrum in the 500-600 nm wavelength domains.

KW - CdSe

KW - Co-sensitization

KW - Photoelectrochemical cells

KW - Quantum dots-sensitized solar cells

KW - Spectral broadening

UR - http://www.scopus.com/inward/record.url?scp=54149095924&partnerID=8YFLogxK

U2 - 10.1016/j.elecom.2008.08.025

DO - 10.1016/j.elecom.2008.08.025

M3 - Article

AN - SCOPUS:54149095924

SN - 1388-2481

VL - 10

SP - 1699

EP - 1702

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 11

ER -

Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this