A novel diphenylphosphinic acid coadsorbent for dye-sensitized solar cell

Heping Shen; Hong Lin; Yizhu Liu; Xin Li; Jing Zhang; Ning Wang; Jianbao Li

doi:10.1016/j.electacta.2010.11.087

A novel diphenylphosphinic acid coadsorbent for dye-sensitized solar cell

Heping Shen, Hong Lin^*, Yizhu Liu, Xin Li, Jing Zhang, Ning Wang, Jianbao Li

^*Corresponding author for this work

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

21 Citations (Scopus)

Abstract

Diphenylphosphinic acid (DPPA) was adopted as a novel coadsorbent in dye-sensitized solar cells (DSCs) based on nanocrystalline TiO₂ sensitized with N719 dye [(Bu₄N)₂[Ru(dcbpyH) ₂(NCS)₂]], leading to a significant enhancement of the cell's performance. Different ratios of dye-to-coadsorbent caused varying results, including a 12.5% increase in overall conversion efficiency coupled with a 10.6% increase in short-circuit current with a ratio of 2:1. Electrochemical impedance spectroscopy (EIS) results indicated that the augment ascribes to inhibited interfacial charge recombination between the conduction band electrons and triiodide ions in the electrolyte. On the other hand, different ratios caused different shift directions of the TiO₂ conduction band, which was confirmed by charge transport resistance obtained also from EIS analysis. To be specific, when the ratio of N719-to-DPPA was 2:1 and 1:1, the conduction band of TiO₂ film was positively shifted, while it was negatively shifted when the ratio was 4:1.

Original language	English
Pages (from-to)	2092-2097
Number of pages	6
Journal	Electrochimica Acta
Volume	56
Issue number	5
DOIs	https://doi.org/10.1016/j.electacta.2010.11.087
Publication status	Published - 1 Feb 2011
Externally published	Yes

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10.1016/j.electacta.2010.11.087

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@article{dcc8b559404d479796ebc788861eb105,

title = "A novel diphenylphosphinic acid coadsorbent for dye-sensitized solar cell",

abstract = "Diphenylphosphinic acid (DPPA) was adopted as a novel coadsorbent in dye-sensitized solar cells (DSCs) based on nanocrystalline TiO2 sensitized with N719 dye [(Bu4N)2[Ru(dcbpyH) 2(NCS)2]], leading to a significant enhancement of the cell's performance. Different ratios of dye-to-coadsorbent caused varying results, including a 12.5% increase in overall conversion efficiency coupled with a 10.6% increase in short-circuit current with a ratio of 2:1. Electrochemical impedance spectroscopy (EIS) results indicated that the augment ascribes to inhibited interfacial charge recombination between the conduction band electrons and triiodide ions in the electrolyte. On the other hand, different ratios caused different shift directions of the TiO2 conduction band, which was confirmed by charge transport resistance obtained also from EIS analysis. To be specific, when the ratio of N719-to-DPPA was 2:1 and 1:1, the conduction band of TiO2 film was positively shifted, while it was negatively shifted when the ratio was 4:1.",

keywords = "Band edge shifting, Coadsorbent, Dye-sensitized solar cell, Recombination inhibition, Surface states passivation",

author = "Heping Shen and Hong Lin and Yizhu Liu and Xin Li and Jing Zhang and Ning Wang and Jianbao Li",

year = "2011",

month = feb,

day = "1",

doi = "10.1016/j.electacta.2010.11.087",

language = "English",

volume = "56",

pages = "2092--2097",

journal = "Electrochimica Acta",

issn = "0013-4686",

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T1 - A novel diphenylphosphinic acid coadsorbent for dye-sensitized solar cell

AU - Shen, Heping

AU - Lin, Hong

AU - Liu, Yizhu

AU - Li, Xin

AU - Zhang, Jing

AU - Wang, Ning

AU - Li, Jianbao

PY - 2011/2/1

Y1 - 2011/2/1

N2 - Diphenylphosphinic acid (DPPA) was adopted as a novel coadsorbent in dye-sensitized solar cells (DSCs) based on nanocrystalline TiO2 sensitized with N719 dye [(Bu4N)2[Ru(dcbpyH) 2(NCS)2]], leading to a significant enhancement of the cell's performance. Different ratios of dye-to-coadsorbent caused varying results, including a 12.5% increase in overall conversion efficiency coupled with a 10.6% increase in short-circuit current with a ratio of 2:1. Electrochemical impedance spectroscopy (EIS) results indicated that the augment ascribes to inhibited interfacial charge recombination between the conduction band electrons and triiodide ions in the electrolyte. On the other hand, different ratios caused different shift directions of the TiO2 conduction band, which was confirmed by charge transport resistance obtained also from EIS analysis. To be specific, when the ratio of N719-to-DPPA was 2:1 and 1:1, the conduction band of TiO2 film was positively shifted, while it was negatively shifted when the ratio was 4:1.

AB - Diphenylphosphinic acid (DPPA) was adopted as a novel coadsorbent in dye-sensitized solar cells (DSCs) based on nanocrystalline TiO2 sensitized with N719 dye [(Bu4N)2[Ru(dcbpyH) 2(NCS)2]], leading to a significant enhancement of the cell's performance. Different ratios of dye-to-coadsorbent caused varying results, including a 12.5% increase in overall conversion efficiency coupled with a 10.6% increase in short-circuit current with a ratio of 2:1. Electrochemical impedance spectroscopy (EIS) results indicated that the augment ascribes to inhibited interfacial charge recombination between the conduction band electrons and triiodide ions in the electrolyte. On the other hand, different ratios caused different shift directions of the TiO2 conduction band, which was confirmed by charge transport resistance obtained also from EIS analysis. To be specific, when the ratio of N719-to-DPPA was 2:1 and 1:1, the conduction band of TiO2 film was positively shifted, while it was negatively shifted when the ratio was 4:1.

KW - Band edge shifting

KW - Coadsorbent

KW - Dye-sensitized solar cell

KW - Recombination inhibition

KW - Surface states passivation

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U2 - 10.1016/j.electacta.2010.11.087

DO - 10.1016/j.electacta.2010.11.087

M3 - Article

SN - 0013-4686

VL - 56

SP - 2092

EP - 2097

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 5

ER -

A novel diphenylphosphinic acid coadsorbent for dye-sensitized solar cell

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