Efficient Ternary CdSSe Quantum-Dot-Sensitized Solar Cells based on MgO-coated TiO2 Nanoparticles

Hui Li; Ran Xiao; Zhe Li; Yawen Zhan; Haidong Bian; Biao Nie; Zhenhua Chen; Jian Lu; Yang Yang Li

doi:10.1002/ente.201400003

Efficient Ternary CdSSe Quantum-Dot-Sensitized Solar Cells based on MgO-coated TiO₂ Nanoparticles

Hui Li
, Ran Xiao
, Zhe Li
, Yawen Zhan
, Haidong Bian
, Biao Nie
, Zhenhua Chen^*
, Jian Lu
, Yang Yang Li

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

10 Citations (Scopus)

Abstract

The high rate of charge recombination in quantum‐dot‐sensitized solar cells (QDSCs) limits their power conversion efficiency. Here we address a facile way to reduce back electron transfer of QDSCs by introducing a thin MgO bridge layer between the TiO₂ film and quantum dots. The ternary CdSSe QDs were used as our model system, and the MgO‐coated TiO₂‐based ternary QDSCs showed a fill factor 41 % larger and efficiency 29 % higher than non‐coated ones. The enhanced performance is owing to the reduced recombination induced by the MgO bridge layer, which has been confirmed by electrochemical impedance spectroscopy (EIS) and intensity‐modulated photovoltage spectroscopy (IMVS) analysis.

Original language	English
Pages (from-to)	526-530
Journal	Energy Technology
Volume	2
Issue number	6
Online published	20 May 2014
DOIs	https://doi.org/10.1002/ente.201400003
Publication status	Published - Jun 2014

Funding

This work was supported by the National Key Basic Research Program of the Chinese Ministry of Science and Technology(-Project 2012CB932203), the National Natural Science Foundation of China (Project 51202206), and the City University of Hong Kong (9667070, 7003039, and 7004009).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

charge recombination
impedance analysis
magnesium oxide
quantum dots
solar cells
SEMICONDUCTOR
TRANSPORT
CDS/CDSE
CIRCUIT
SIZE

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10.1002/ente.201400003

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Cite this

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title = "Efficient Ternary CdSSe Quantum-Dot-Sensitized Solar Cells based on MgO-coated TiO2 Nanoparticles",

abstract = "The high rate of charge recombination in quantum‐dot‐sensitized solar cells (QDSCs) limits their power conversion efficiency. Here we address a facile way to reduce back electron transfer of QDSCs by introducing a thin MgO bridge layer between the TiO2 film and quantum dots. The ternary CdSSe QDs were used as our model system, and the MgO‐coated TiO2‐based ternary QDSCs showed a fill factor 41 \% larger and efficiency 29 \% higher than non‐coated ones. The enhanced performance is owing to the reduced recombination induced by the MgO bridge layer, which has been confirmed by electrochemical impedance spectroscopy (EIS) and intensity‐modulated photovoltage spectroscopy (IMVS) analysis.",

keywords = "charge recombination, impedance analysis, magnesium oxide, quantum dots, solar cells, SEMICONDUCTOR, TRANSPORT, CDS/CDSE, CIRCUIT, SIZE",

author = "Hui Li and Ran Xiao and Zhe Li and Yawen Zhan and Haidong Bian and Biao Nie and Zhenhua Chen and Jian Lu and Li, \{Yang Yang\}",

year = "2014",

month = jun,

doi = "10.1002/ente.201400003",

language = "English",

volume = "2",

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journal = "Energy Technology",

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T1 - Efficient Ternary CdSSe Quantum-Dot-Sensitized Solar Cells based on MgO-coated TiO2 Nanoparticles

AU - Li, Hui

AU - Xiao, Ran

AU - Li, Zhe

AU - Zhan, Yawen

AU - Bian, Haidong

AU - Nie, Biao

AU - Chen, Zhenhua

AU - Lu, Jian

AU - Li, Yang Yang

PY - 2014/6

Y1 - 2014/6

N2 - The high rate of charge recombination in quantum‐dot‐sensitized solar cells (QDSCs) limits their power conversion efficiency. Here we address a facile way to reduce back electron transfer of QDSCs by introducing a thin MgO bridge layer between the TiO2 film and quantum dots. The ternary CdSSe QDs were used as our model system, and the MgO‐coated TiO2‐based ternary QDSCs showed a fill factor 41 % larger and efficiency 29 % higher than non‐coated ones. The enhanced performance is owing to the reduced recombination induced by the MgO bridge layer, which has been confirmed by electrochemical impedance spectroscopy (EIS) and intensity‐modulated photovoltage spectroscopy (IMVS) analysis.

AB - The high rate of charge recombination in quantum‐dot‐sensitized solar cells (QDSCs) limits their power conversion efficiency. Here we address a facile way to reduce back electron transfer of QDSCs by introducing a thin MgO bridge layer between the TiO2 film and quantum dots. The ternary CdSSe QDs were used as our model system, and the MgO‐coated TiO2‐based ternary QDSCs showed a fill factor 41 % larger and efficiency 29 % higher than non‐coated ones. The enhanced performance is owing to the reduced recombination induced by the MgO bridge layer, which has been confirmed by electrochemical impedance spectroscopy (EIS) and intensity‐modulated photovoltage spectroscopy (IMVS) analysis.

KW - charge recombination

KW - impedance analysis

KW - magnesium oxide

KW - quantum dots

KW - solar cells

KW - SEMICONDUCTOR

KW - TRANSPORT

KW - CDS/CDSE

KW - CIRCUIT

KW - SIZE

UR - https://www.scopus.com/pages/publications/84951784804

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84951784804&origin=recordpage

U2 - 10.1002/ente.201400003

DO - 10.1002/ente.201400003

M3 - RGC 21 - Publication in refereed journal

SN - 2194-4288

VL - 2

SP - 526

EP - 530

JO - Energy Technology

JF - Energy Technology

IS - 6

ER -