Electron transport and recombination in TiO2 nanofiber dye sensitized solar cell

Jinwei Li; Yong Shi

doi:10.1115/imece2011-64979

Electron transport and recombination in TiO₂ nanofiber dye sensitized solar cell

Jinwei Li
, Yong Shi

Department of Mechanical Engineering

Stevens Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

Dye sensitized solar cells (DSSCs), a new type of photo-electrochemical solar cells, are a promising alternative to the silicon based photovoltaic because they hold advantages of low cost, simple manufacturing processes and higher conversion efficiency compared with other types of excitonic solar cell. DSSCs with conversion efficiencies of up to 11% have been achieved with a highly stable electrolyte under AM1.5G conditions. Recently, one dimensional (1D) electrospun TiO₂ nanofibers have been used as the DSSC photoanode to improve the electron transport efficiency and enhance the light harvest efficiency by scattering more light in the red part of the solar spectrum. In this paper, stepped light induced transient measurement of photocurrent and voltage (SLIM-PCV) has been employed to study electron transport and recombination in DSSCs. Electron diffusion coefficients and electron lifetimes were measured with differing light intensities. The electron diffusion coefficients and electron lifetimes strong correlate with intensity, which indicates the trap limited diffusion process for electrons in the TiO ₂ nanofiber DSSC.

Original language	English
Title of host publication	Nano and Micro Materials, Devices and Systems; Microsystems Integration
Pages	361-363
Number of pages	3
DOIs	https://doi.org/10.1115/imece2011-64979
State	Published - 2011
Event	ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 - Denver, CO, United States Duration: 11 Nov 2011 → 17 Nov 2011

Publication series

Name	ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Volume	11

Conference

Conference	ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Country/Territory	United States
City	Denver, CO
Period	11/11/11 → 17/11/11

UN SDGs

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

SDG 7 Affordable and Clean Energy
SDG 12 Responsible Consumption and Production

Access to Document

10.1115/imece2011-64979

Cite this

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title = "Electron transport and recombination in TiO2 nanofiber dye sensitized solar cell",

abstract = "Dye sensitized solar cells (DSSCs), a new type of photo-electrochemical solar cells, are a promising alternative to the silicon based photovoltaic because they hold advantages of low cost, simple manufacturing processes and higher conversion efficiency compared with other types of excitonic solar cell. DSSCs with conversion efficiencies of up to 11\% have been achieved with a highly stable electrolyte under AM1.5G conditions. Recently, one dimensional (1D) electrospun TiO2 nanofibers have been used as the DSSC photoanode to improve the electron transport efficiency and enhance the light harvest efficiency by scattering more light in the red part of the solar spectrum. In this paper, stepped light induced transient measurement of photocurrent and voltage (SLIM-PCV) has been employed to study electron transport and recombination in DSSCs. Electron diffusion coefficients and electron lifetimes were measured with differing light intensities. The electron diffusion coefficients and electron lifetimes strong correlate with intensity, which indicates the trap limited diffusion process for electrons in the TiO 2 nanofiber DSSC.",

author = "Jinwei Li and Yong Shi",

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doi = "10.1115/imece2011-64979",

language = "English",

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series = "ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011",

pages = "361--363",

booktitle = "Nano and Micro Materials, Devices and Systems; Microsystems Integration",

note = "ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 ; Conference date: 11-11-2011 Through 17-11-2011",

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Li, J & Shi, Y 2011, Electron transport and recombination in TiO₂ nanofiber dye sensitized solar cell. in Nano and Micro Materials, Devices and Systems; Microsystems Integration. ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, vol. 11, pp. 361-363, ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, Denver, CO, United States, 11/11/11. https://doi.org/10.1115/imece2011-64979

Electron transport and recombination in TiO₂ nanofiber dye sensitized solar cell. / Li, Jinwei; Shi, Yong.
Nano and Micro Materials, Devices and Systems; Microsystems Integration. 2011. p. 361-363 (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; Vol. 11).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - Dye sensitized solar cells (DSSCs), a new type of photo-electrochemical solar cells, are a promising alternative to the silicon based photovoltaic because they hold advantages of low cost, simple manufacturing processes and higher conversion efficiency compared with other types of excitonic solar cell. DSSCs with conversion efficiencies of up to 11% have been achieved with a highly stable electrolyte under AM1.5G conditions. Recently, one dimensional (1D) electrospun TiO2 nanofibers have been used as the DSSC photoanode to improve the electron transport efficiency and enhance the light harvest efficiency by scattering more light in the red part of the solar spectrum. In this paper, stepped light induced transient measurement of photocurrent and voltage (SLIM-PCV) has been employed to study electron transport and recombination in DSSCs. Electron diffusion coefficients and electron lifetimes were measured with differing light intensities. The electron diffusion coefficients and electron lifetimes strong correlate with intensity, which indicates the trap limited diffusion process for electrons in the TiO 2 nanofiber DSSC.

AB - Dye sensitized solar cells (DSSCs), a new type of photo-electrochemical solar cells, are a promising alternative to the silicon based photovoltaic because they hold advantages of low cost, simple manufacturing processes and higher conversion efficiency compared with other types of excitonic solar cell. DSSCs with conversion efficiencies of up to 11% have been achieved with a highly stable electrolyte under AM1.5G conditions. Recently, one dimensional (1D) electrospun TiO2 nanofibers have been used as the DSSC photoanode to improve the electron transport efficiency and enhance the light harvest efficiency by scattering more light in the red part of the solar spectrum. In this paper, stepped light induced transient measurement of photocurrent and voltage (SLIM-PCV) has been employed to study electron transport and recombination in DSSCs. Electron diffusion coefficients and electron lifetimes were measured with differing light intensities. The electron diffusion coefficients and electron lifetimes strong correlate with intensity, which indicates the trap limited diffusion process for electrons in the TiO 2 nanofiber DSSC.

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