Cited 0 time in webofscience Cited 0 time in scopus

Effects of a dianion compound as a surface modifier on the back reaction of photogenerated electrons in TiO2-based solar cells

Title
Effects of a dianion compound as a surface modifier on the back reaction of photogenerated electrons in TiO2-based solar cells
Authors
Kim, Ji YoungKim, Ki HongKim, Dae-HwanHan, Yoon Soo
DGIST Authors
Kim, Dae-Hwan
Issue Date
ACCEPT
Citation
Arabian Journal of Chemistry
Type
Article
Article Type
Article in Press
Keywords
ElectrolytesElectrostatic devicesEthaneNegative ionsOpen circuit voltageSolar cellsTitanium dioxideBack reactionDianionsDisodium saltElectrochemical impedanceOpen circuit voltage decaysPhoto-injected electronsPhotogenerated electronsPower conversion efficienciesDye-sensitized solar cells
ISSN
1878-5352
Abstract
The TiO2 films were modified with a dianion compound, 1,2-ethanedisulfonic acid disodium salt (ESD), to give a negative charge (ethane sulfonate anion) on the TiO2 surface, i.e., TiO2-O-SO2-CH2-CH2-SO3 −), and effects of repulsion between the negative charge and ions (I3 −) of the electrolyte on the performance of dye-sensitized solar cells (DSSCs) were investigated. The reference device without any modification showed a power conversion efficiency (PCE) of 9.89%, whereas for the device with ESD(20)-TiO2/FTO, which was prepared by soaking bare TiO2/FTO in an ESD solution for 20 min, the PCE was increased to 10.97%, due to an increase in both short-circuit current (Jsc) and open-circuit voltage(Voc). It was verified from the measurements of electrochemical impedance, open-circuit voltage decay and dark current that the enhancement in the Jsc and Voc values was attributed to the reduced back reaction between photoinjected electrons and I3 − ions, resulting from the presence of the ethane sulfonate anions on the TiO2 surface. © 2018 King Saud University
URI
http://hdl.handle.net/20.500.11750/6559
DOI
10.1016/j.arabjc.2018.04.017
Publisher
Elsevier B.V.
Related Researcher
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Solar Energy1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE