Steric Effect of N-Substituted Triphenylamine on Double-Anchored Phenothiazine Dye-Sensitized Solar Cells

Bo Yu Han; Tzu Ying Pan; Yi Chen Wu; Jiann T. Lin; Hsien Hsin Chou; Chun Ting Li

doi:10.1021/acsaem.2c04022

Steric Effect of N-Substituted Triphenylamine on Double-Anchored Phenothiazine Dye-Sensitized Solar Cells

Bo Yu Han, Tzu Ying Pan, Yi Chen Wu, Jiann T. Lin, Hsien Hsin Chou, Chun Ting Li^*

^*Corresponding author for this work

Department of Chemistry

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

11 Citations (Scopus)

Abstract

Bulky N-substituents of 4-(hexyloxy) phenyl-substituted and 4-(hexylthio)phenyl-substituted triphenylamine (TPA) were successfully introduced into double-anchored phenothiazine (PTZ) dyes (TY1-TY3) as capping moieties for metal-free organic sensitizers in dye-sensitized solar cells (DSSCs). Among TY dyes, the N-substituent of 4-(hexyloxy)phenyl-substituted TPA provided the best steric matching to its double-anchored PTZ dye having a small π-bridge of thiophene (TY1) and thereby facilitated the most compact dye packing as well as formed the most integrated shelter layer on the TiO₂ surface. Effective dark current suppression supported by TY1 resulted in a good DSSC performance of 10.47% at 1 sun and 21.2% at 1 klux (Philips T5 lamp) with the presence of chenodeoxycholic acid (CDCA) as the co-adsorbent; this cell efficacy was higher than that of the reference N719-based (9.10% at 1 sun) and HL5-based DSSCs (8.34% at 1 sun).

Original language	English
Pages (from-to)	3778-3788
Number of pages	11
Journal	ACS Applied Energy Materials
Volume	6
Issue number	7
DOIs	https://doi.org/10.1021/acsaem.2c04022
Publication status	Published - 2023 Apr 10

Keywords

double-anchor
dye-sensitized solar cells
metal-free organic sensitizers
phenothiazine
triphenylamine

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

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10.1021/acsaem.2c04022

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title = "Steric Effect of N-Substituted Triphenylamine on Double-Anchored Phenothiazine Dye-Sensitized Solar Cells",

abstract = "Bulky N-substituents of 4-(hexyloxy) phenyl-substituted and 4-(hexylthio)phenyl-substituted triphenylamine (TPA) were successfully introduced into double-anchored phenothiazine (PTZ) dyes (TY1-TY3) as capping moieties for metal-free organic sensitizers in dye-sensitized solar cells (DSSCs). Among TY dyes, the N-substituent of 4-(hexyloxy)phenyl-substituted TPA provided the best steric matching to its double-anchored PTZ dye having a small π-bridge of thiophene (TY1) and thereby facilitated the most compact dye packing as well as formed the most integrated shelter layer on the TiO2 surface. Effective dark current suppression supported by TY1 resulted in a good DSSC performance of 10.47% at 1 sun and 21.2% at 1 klux (Philips T5 lamp) with the presence of chenodeoxycholic acid (CDCA) as the co-adsorbent; this cell efficacy was higher than that of the reference N719-based (9.10% at 1 sun) and HL5-based DSSCs (8.34% at 1 sun).",

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AU - Han, Bo Yu

AU - Pan, Tzu Ying

AU - Wu, Yi Chen

AU - Lin, Jiann T.

AU - Chou, Hsien Hsin

AU - Li, Chun Ting

PY - 2023/4/10

Y1 - 2023/4/10

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AB - Bulky N-substituents of 4-(hexyloxy) phenyl-substituted and 4-(hexylthio)phenyl-substituted triphenylamine (TPA) were successfully introduced into double-anchored phenothiazine (PTZ) dyes (TY1-TY3) as capping moieties for metal-free organic sensitizers in dye-sensitized solar cells (DSSCs). Among TY dyes, the N-substituent of 4-(hexyloxy)phenyl-substituted TPA provided the best steric matching to its double-anchored PTZ dye having a small π-bridge of thiophene (TY1) and thereby facilitated the most compact dye packing as well as formed the most integrated shelter layer on the TiO2 surface. Effective dark current suppression supported by TY1 resulted in a good DSSC performance of 10.47% at 1 sun and 21.2% at 1 klux (Philips T5 lamp) with the presence of chenodeoxycholic acid (CDCA) as the co-adsorbent; this cell efficacy was higher than that of the reference N719-based (9.10% at 1 sun) and HL5-based DSSCs (8.34% at 1 sun).

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Steric Effect of N-Substituted Triphenylamine on Double-Anchored Phenothiazine Dye-Sensitized Solar Cells

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