Solution-processed pH-neutral conjugated polyelectrolyte improves interfacial contact in organic solar cells

Huiqiong Zhou; Yuan Zhang; Cheng Kang Mai; Jason Seifter; Thuc Quyen Nguyen; Guillermo C. Bazan; Alan J. Heeger

doi:10.1021/nn505378m

Solution-processed pH-neutral conjugated polyelectrolyte improves interfacial contact in organic solar cells

Huiqiong Zhou
, Yuan Zhang
, Cheng Kang Mai
, Jason Seifter
, Thuc Quyen Nguyen
, Guillermo C. Bazan^*
, Alan J. Heeger

^*Corresponding author for this work

University of California at Santa Barbara

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

79 Scopus citations

Abstract

The intrinsic acidic nature of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole-transporting layer (HTL) induces interfacial protonation and limits the device performance in organic solar cells based on basic pyridylthiadiazole units. By utilizing a pH neutral, water/alcohol soluble conjugated polyelectrolyte CPE-K as the HTL in p-DTS(PTTh₂)₂:PC₇₁BM solar cells, a 60% enhancement in PCE has been obtained with an increased V_bi, reduced R_s, and improved charge extraction. These effects originate from the elimination of interfacial protonation and energy barrier compared with the PEDOT:PSS HTL.

Original language	English
Pages (from-to)	371-377
Number of pages	7
Journal	ACS Nano
Volume	9
Issue number	1
DOIs	https://doi.org/10.1021/nn505378m
State	Published - 27 Jan 2015
Externally published	Yes

Keywords

bulk heterojunctions
hole-transporting layers
interface engineering
interfacial interaction
organic solar cells

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10.1021/nn505378m

Cite this

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title = "Solution-processed pH-neutral conjugated polyelectrolyte improves interfacial contact in organic solar cells",

abstract = "The intrinsic acidic nature of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole-transporting layer (HTL) induces interfacial protonation and limits the device performance in organic solar cells based on basic pyridylthiadiazole units. By utilizing a pH neutral, water/alcohol soluble conjugated polyelectrolyte CPE-K as the HTL in p-DTS(PTTh2)2:PC71BM solar cells, a 60\% enhancement in PCE has been obtained with an increased Vbi, reduced Rs, and improved charge extraction. These effects originate from the elimination of interfacial protonation and energy barrier compared with the PEDOT:PSS HTL.",

keywords = "bulk heterojunctions, hole-transporting layers, interface engineering, interfacial interaction, organic solar cells",

author = "Huiqiong Zhou and Yuan Zhang and Mai, \{Cheng Kang\} and Jason Seifter and Nguyen, \{Thuc Quyen\} and Bazan, \{Guillermo C.\} and Heeger, \{Alan J.\}",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2015",

month = jan,

day = "27",

doi = "10.1021/nn505378m",

language = "英语",

volume = "9",

pages = "371--377",

journal = "ACS Nano",

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number = "1",

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TY - JOUR

T1 - Solution-processed pH-neutral conjugated polyelectrolyte improves interfacial contact in organic solar cells

AU - Zhou, Huiqiong

AU - Zhang, Yuan

AU - Mai, Cheng Kang

AU - Seifter, Jason

AU - Nguyen, Thuc Quyen

AU - Bazan, Guillermo C.

AU - Heeger, Alan J.

PY - 2015/1/27

Y1 - 2015/1/27

N2 - The intrinsic acidic nature of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole-transporting layer (HTL) induces interfacial protonation and limits the device performance in organic solar cells based on basic pyridylthiadiazole units. By utilizing a pH neutral, water/alcohol soluble conjugated polyelectrolyte CPE-K as the HTL in p-DTS(PTTh2)2:PC71BM solar cells, a 60% enhancement in PCE has been obtained with an increased Vbi, reduced Rs, and improved charge extraction. These effects originate from the elimination of interfacial protonation and energy barrier compared with the PEDOT:PSS HTL.

AB - The intrinsic acidic nature of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole-transporting layer (HTL) induces interfacial protonation and limits the device performance in organic solar cells based on basic pyridylthiadiazole units. By utilizing a pH neutral, water/alcohol soluble conjugated polyelectrolyte CPE-K as the HTL in p-DTS(PTTh2)2:PC71BM solar cells, a 60% enhancement in PCE has been obtained with an increased Vbi, reduced Rs, and improved charge extraction. These effects originate from the elimination of interfacial protonation and energy barrier compared with the PEDOT:PSS HTL.

KW - bulk heterojunctions

KW - hole-transporting layers

KW - interface engineering

KW - interfacial interaction

KW - organic solar cells

UR - https://www.scopus.com/pages/publications/84921767916

U2 - 10.1021/nn505378m

DO - 10.1021/nn505378m

M3 - 文章

AN - SCOPUS:84921767916

SN - 1936-0851

VL - 9

SP - 371

EP - 377

JO - ACS Nano

JF - ACS Nano

IS - 1

ER -

Solution-processed pH-neutral conjugated polyelectrolyte improves interfacial contact in organic solar cells

Abstract

Keywords

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