Charge interaction and interfacial electronic structures in a solid-state dye-sensitized solar cell

Tsz Wai Ng; Chiu Yee Chan; Qing Dan Yang; Huai Xin Wei; Ming Fai Lo; V. A.L. Roy; Wen Jun Zhang; Chun Sing Lee

doi:10.1016/j.orgel.2013.07.029

Charge interaction and interfacial electronic structures in a solid-state dye-sensitized solar cell

Tsz Wai Ng, Chiu Yee Chan, Qing Dan Yang, Huai Xin Wei, Ming Fai Lo, V. A.L. Roy, Wen Jun Zhang, Chun Sing Lee

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

10 Citations (Scopus)

Abstract

Fully solid-state dye-sensitized solar cell (DSSC) has attracted much recent attention. While the origins of the lower performance in DSSC using solid electrolyte are not fully understood, there is so far no report on their interfacial electronic structures. Here, we report the charge exchange and interfacial energetics in a standard solid-state DSSC with a structure of FTO/TiO₂/cis-disothiocyanato-bis(2,2′-bipyridyl-4,4′- dicarboxylato) ruthenium(II) bis-(tetrabutylammonium) (N179 dye)/2,2,7,7- tetrakis-(N,N-di-pmethoxyphenyl-amine) 9,9-spirobifluorene (spiro-OMeTAD). While the electron-extracting barrier at TiO₂/N719 interface is negligibly small (0.19 eV); the abrupt vacuum levels (VLs) offsets at N719/spiro-OMeTAD interfaces results in large hole-extracting barrier of 0.43 eV. Our results suggest an electronic mismatch in charge collection using spiro-OMeTAD as the hole-conducting material.

Original language	English
Pages (from-to)	2743-2747
Number of pages	5
Journal	Organic Electronics
Volume	14
Issue number	11
DOIs	https://doi.org/10.1016/j.orgel.2013.07.029
Publication status	Published - 2013
Externally published	Yes

Keywords

DSSC
Energy level diagram N719
Interfacial dipole
Solid state
Ultraviolet photoemission spectroscopy

Access to Document

10.1016/j.orgel.2013.07.029

Cite this

@article{80d85f441f574dbfaad086430962c0b7,

title = "Charge interaction and interfacial electronic structures in a solid-state dye-sensitized solar cell",

abstract = "Fully solid-state dye-sensitized solar cell (DSSC) has attracted much recent attention. While the origins of the lower performance in DSSC using solid electrolyte are not fully understood, there is so far no report on their interfacial electronic structures. Here, we report the charge exchange and interfacial energetics in a standard solid-state DSSC with a structure of FTO/TiO2/cis-disothiocyanato-bis(2,2′-bipyridyl-4,4′- dicarboxylato) ruthenium(II) bis-(tetrabutylammonium) (N179 dye)/2,2,7,7- tetrakis-(N,N-di-pmethoxyphenyl-amine) 9,9-spirobifluorene (spiro-OMeTAD). While the electron-extracting barrier at TiO2/N719 interface is negligibly small (0.19 eV); the abrupt vacuum levels (VLs) offsets at N719/spiro-OMeTAD interfaces results in large hole-extracting barrier of 0.43 eV. Our results suggest an electronic mismatch in charge collection using spiro-OMeTAD as the hole-conducting material.",

keywords = "DSSC, Energy level diagram N719, Interfacial dipole, Solid state, Ultraviolet photoemission spectroscopy",

author = "Ng, {Tsz Wai} and Chan, {Chiu Yee} and Yang, {Qing Dan} and Wei, {Huai Xin} and Lo, {Ming Fai} and Roy, {V. A.L.} and Zhang, {Wen Jun} and Lee, {Chun Sing}",

note = "Funding Information: The work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-713/11 ).",

year = "2013",

doi = "10.1016/j.orgel.2013.07.029",

language = "English",

volume = "14",

pages = "2743--2747",

number = "11",

}

TY - JOUR

T1 - Charge interaction and interfacial electronic structures in a solid-state dye-sensitized solar cell

AU - Ng, Tsz Wai

AU - Chan, Chiu Yee

AU - Yang, Qing Dan

AU - Wei, Huai Xin

AU - Lo, Ming Fai

AU - Roy, V. A.L.

AU - Zhang, Wen Jun

AU - Lee, Chun Sing

N1 - Funding Information: The work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-713/11 ).

PY - 2013

Y1 - 2013

N2 - Fully solid-state dye-sensitized solar cell (DSSC) has attracted much recent attention. While the origins of the lower performance in DSSC using solid electrolyte are not fully understood, there is so far no report on their interfacial electronic structures. Here, we report the charge exchange and interfacial energetics in a standard solid-state DSSC with a structure of FTO/TiO2/cis-disothiocyanato-bis(2,2′-bipyridyl-4,4′- dicarboxylato) ruthenium(II) bis-(tetrabutylammonium) (N179 dye)/2,2,7,7- tetrakis-(N,N-di-pmethoxyphenyl-amine) 9,9-spirobifluorene (spiro-OMeTAD). While the electron-extracting barrier at TiO2/N719 interface is negligibly small (0.19 eV); the abrupt vacuum levels (VLs) offsets at N719/spiro-OMeTAD interfaces results in large hole-extracting barrier of 0.43 eV. Our results suggest an electronic mismatch in charge collection using spiro-OMeTAD as the hole-conducting material.

AB - Fully solid-state dye-sensitized solar cell (DSSC) has attracted much recent attention. While the origins of the lower performance in DSSC using solid electrolyte are not fully understood, there is so far no report on their interfacial electronic structures. Here, we report the charge exchange and interfacial energetics in a standard solid-state DSSC with a structure of FTO/TiO2/cis-disothiocyanato-bis(2,2′-bipyridyl-4,4′- dicarboxylato) ruthenium(II) bis-(tetrabutylammonium) (N179 dye)/2,2,7,7- tetrakis-(N,N-di-pmethoxyphenyl-amine) 9,9-spirobifluorene (spiro-OMeTAD). While the electron-extracting barrier at TiO2/N719 interface is negligibly small (0.19 eV); the abrupt vacuum levels (VLs) offsets at N719/spiro-OMeTAD interfaces results in large hole-extracting barrier of 0.43 eV. Our results suggest an electronic mismatch in charge collection using spiro-OMeTAD as the hole-conducting material.

KW - DSSC

KW - Energy level diagram N719

KW - Interfacial dipole

KW - Solid state

KW - Ultraviolet photoemission spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=84882404035&partnerID=8YFLogxK

U2 - 10.1016/j.orgel.2013.07.029

DO - 10.1016/j.orgel.2013.07.029

M3 - Article

AN - SCOPUS:84882404035

SN - 1566-1199

VL - 14

SP - 2743

EP - 2747

JO - Organic Electronics

JF - Organic Electronics

IS - 11

ER -

Charge interaction and interfacial electronic structures in a solid-state dye-sensitized solar cell

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this