Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: an Electrolyte Effect

Jiajia Gao; Ahmed El- zohry; Herri Trilaksana; Erik Gabrielsson; Valentina Leandri; Hanna Ellis; Luca D'Amario; Majid Safdari; James Gardner; Gunther Andersson; Lars Kloo

doi:10.1021/acsami.8b06897

Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: an Electrolyte Effect

Jiajia Gao, Ahmed El- zohry, Herri Trilaksana, Erik Gabrielsson, Valentina Leandri, Hanna Ellis, Luca D'Amario, Majid Safdari, James Gardner, Gunther Andersson, Lars Kloo

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Abstract

A significant increase in the photocurrent generation during light soaking for solar cells sensitized by the triphenylamine-based D−π–A organic dyes (PD2 and LEG1) and mediated by cobalt bipyridine redox complexes has been observed and investigated. The crucial role of the electrolyte has been identified in the performance improvement. Control experiments based on a pre-treatment strategy reveals TBP as the origin. The increase in the current and IPCE has been interpreted by the interfacial charge-transfer kinetics studies. A slow component in the injection kinetics was exposed for this system. This change explains the increase in the electron lifetime and collection efficiency. Photoelectron spectroscopic measurements show energy shifts at the dye/TiO2 interface, leading us to formulate a hypothesis with respect to an electrolyte-induced dye reorganization at the surface.

Original language	English
Pages (from-to)	26241-26247
Number of pages	7
Journal	ACS Applied Materials & Interfaces
Volume	10
Issue number	31
DOIs	https://doi.org/10.1021/acsami.8b06897
Publication status	Published - 8 Aug 2018

Bibliographical note

This is an open access article published under a Creative Commons Attribution (CC-BY)
License, which permits unrestricted use, distribution and reproduction in any medium,
provided the author and source are cited.

Keywords

dye-sensitized solar cells
electrolyte
interface
Dynamics
light soaking
dynamics

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Gao_Light-induced_P2018Final published version, 1.99 MBLicence: CC BY

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Gao, J., El- zohry, A., Trilaksana, H., Gabrielsson, E., Leandri, V., Ellis, H., D'Amario, L., Safdari, M., Gardner, J., Andersson, G., & Kloo, L. (2018). Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: an Electrolyte Effect. ACS Applied Materials & Interfaces, 10(31), 26241-26247. https://doi.org/10.1021/acsami.8b06897

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title = "Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: an Electrolyte Effect",

abstract = "A significant increase in the photocurrent generation during light soaking for solar cells sensitized by the triphenylamine-based D−π–A organic dyes (PD2 and LEG1) and mediated by cobalt bipyridine redox complexes has been observed and investigated. The crucial role of the electrolyte has been identified in the performance improvement. Control experiments based on a pre-treatment strategy reveals TBP as the origin. The increase in the current and IPCE has been interpreted by the interfacial charge-transfer kinetics studies. A slow component in the injection kinetics was exposed for this system. This change explains the increase in the electron lifetime and collection efficiency. Photoelectron spectroscopic measurements show energy shifts at the dye/TiO2 interface, leading us to formulate a hypothesis with respect to an electrolyte-induced dye reorganization at the surface.",

keywords = "dye-sensitized solar cells, electrolyte, interface, Dynamics, light soaking, dynamics",

author = "Jiajia Gao and {El- zohry}, Ahmed and Herri Trilaksana and Erik Gabrielsson and Valentina Leandri and Hanna Ellis and Luca D'Amario and Majid Safdari and James Gardner and Gunther Andersson and Lars Kloo",

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Gao, J, El- zohry, A, Trilaksana, H, Gabrielsson, E, Leandri, V, Ellis, H, D'Amario, L, Safdari, M, Gardner, J, Andersson, G & Kloo, L 2018, 'Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: an Electrolyte Effect', ACS Applied Materials & Interfaces, vol. 10, no. 31, pp. 26241-26247. https://doi.org/10.1021/acsami.8b06897

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T2 - an Electrolyte Effect

AU - Gao, Jiajia

AU - El- zohry, Ahmed

AU - Trilaksana, Herri

AU - Gabrielsson, Erik

AU - Leandri, Valentina

AU - Ellis, Hanna

AU - D'Amario, Luca

AU - Safdari, Majid

AU - Gardner, James

AU - Andersson, Gunther

AU - Kloo, Lars

N1 - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.

PY - 2018/8/8

Y1 - 2018/8/8

N2 - A significant increase in the photocurrent generation during light soaking for solar cells sensitized by the triphenylamine-based D−π–A organic dyes (PD2 and LEG1) and mediated by cobalt bipyridine redox complexes has been observed and investigated. The crucial role of the electrolyte has been identified in the performance improvement. Control experiments based on a pre-treatment strategy reveals TBP as the origin. The increase in the current and IPCE has been interpreted by the interfacial charge-transfer kinetics studies. A slow component in the injection kinetics was exposed for this system. This change explains the increase in the electron lifetime and collection efficiency. Photoelectron spectroscopic measurements show energy shifts at the dye/TiO2 interface, leading us to formulate a hypothesis with respect to an electrolyte-induced dye reorganization at the surface.

AB - A significant increase in the photocurrent generation during light soaking for solar cells sensitized by the triphenylamine-based D−π–A organic dyes (PD2 and LEG1) and mediated by cobalt bipyridine redox complexes has been observed and investigated. The crucial role of the electrolyte has been identified in the performance improvement. Control experiments based on a pre-treatment strategy reveals TBP as the origin. The increase in the current and IPCE has been interpreted by the interfacial charge-transfer kinetics studies. A slow component in the injection kinetics was exposed for this system. This change explains the increase in the electron lifetime and collection efficiency. Photoelectron spectroscopic measurements show energy shifts at the dye/TiO2 interface, leading us to formulate a hypothesis with respect to an electrolyte-induced dye reorganization at the surface.

KW - dye-sensitized solar cells

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KW - interface

KW - Dynamics

KW - light soaking

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SN - 1944-8244

IS - 31

ER -

Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: an Electrolyte Effect

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