Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Jung Joon Lee; Seung Hwan Lee; Felix Sunjoo Kim; Hyang Hee Choi; Jung Hyun Kim

doi:10.1016/j.orgel.2015.07.022

Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Jung Joon Lee, Seung Hwan Lee, Felix Sunjoo Kim, Hyang Hee Choi, Jung Hyun Kim

Department of Chemical and Biomolecular Engineering

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

44 Citations (Scopus)

Abstract

Abstract We report a simple processing method to simultaneously improve the efficiency and stability of organic solar cells (OSCs). Poly(4-styrene sulfonate)-doped poly(3,4-ethylenedioxy-thiophene (PEDOT:PSS), widely used as hole transport layer (HTL) in OSCs, tends to accelerate the degradation of devices because of its hygroscopic and acidic properties. In this regard, we have modified PEDOT:PSS to reduce its hygroscopic and acidic properties through a condensation reaction between PEDOT:PSS and poly(ethylene glycol) methyl ether (PEGME) in order to improve the efficiency and stability of OSCs. As a result, the power conversion efficiency (PCE) increased by 21%, from 2.57% up to 3.11%. A better energy level alignment by the reduced work function of the modified PEDOT:PSS with a highest occupied molecular orbital (HOMO) level of poly(3-hexylthiophene-2,5-diyl) (P3HT) is considered the origin of the improved the efficiency. The half-life of OSCs with PEDOT:PSS modified with PEGME buffer layer also increased up to 3.5 times compared to that of devices with pristine PEDOT:PSS buffer layer.

Original language	English
Article number	3184
Pages (from-to)	191-199
Number of pages	9
Journal	Organic Electronics
Volume	26
DOIs	https://doi.org/10.1016/j.orgel.2015.07.022
Publication status	Published - 2015 Jul 25

Bibliographical note

Funding Information:
This research was supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP, Korea) (NRF-2014M3A7B4050960, 2014M3A7B4051745 and 2014M3A7B4051749), the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (2010-0019550), the Priority Research Center Program through the NRF funded by the Ministry of Education, Science and Technology (No. 2009-0093823) and the National Research Foundation of Korea (NRF) funded by the government of Republic of Korea ( MSIP ) (No. 2007-0056091 ).

Publisher Copyright:
© 2015 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.orgel.2015.07.022

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title = "Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer",

abstract = "Abstract We report a simple processing method to simultaneously improve the efficiency and stability of organic solar cells (OSCs). Poly(4-styrene sulfonate)-doped poly(3,4-ethylenedioxy-thiophene (PEDOT:PSS), widely used as hole transport layer (HTL) in OSCs, tends to accelerate the degradation of devices because of its hygroscopic and acidic properties. In this regard, we have modified PEDOT:PSS to reduce its hygroscopic and acidic properties through a condensation reaction between PEDOT:PSS and poly(ethylene glycol) methyl ether (PEGME) in order to improve the efficiency and stability of OSCs. As a result, the power conversion efficiency (PCE) increased by 21%, from 2.57% up to 3.11%. A better energy level alignment by the reduced work function of the modified PEDOT:PSS with a highest occupied molecular orbital (HOMO) level of poly(3-hexylthiophene-2,5-diyl) (P3HT) is considered the origin of the improved the efficiency. The half-life of OSCs with PEDOT:PSS modified with PEGME buffer layer also increased up to 3.5 times compared to that of devices with pristine PEDOT:PSS buffer layer.",

author = "Lee, {Jung Joon} and Lee, {Seung Hwan} and Kim, {Felix Sunjoo} and Choi, {Hyang Hee} and Kim, {Jung Hyun}",

note = "Funding Information: This research was supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP, Korea) (NRF-2014M3A7B4050960, 2014M3A7B4051745 and 2014M3A7B4051749), the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (2010-0019550), the Priority Research Center Program through the NRF funded by the Ministry of Education, Science and Technology (No. 2009-0093823) and the National Research Foundation of Korea (NRF) funded by the government of Republic of Korea ( MSIP ) (No. 2007-0056091 ). Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

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doi = "10.1016/j.orgel.2015.07.022",

language = "English",

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T1 - Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

AU - Lee, Jung Joon

AU - Lee, Seung Hwan

AU - Kim, Felix Sunjoo

AU - Choi, Hyang Hee

AU - Kim, Jung Hyun

N1 - Funding Information: This research was supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP, Korea) (NRF-2014M3A7B4050960, 2014M3A7B4051745 and 2014M3A7B4051749), the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (2010-0019550), the Priority Research Center Program through the NRF funded by the Ministry of Education, Science and Technology (No. 2009-0093823) and the National Research Foundation of Korea (NRF) funded by the government of Republic of Korea ( MSIP ) (No. 2007-0056091 ). Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/7/25

Y1 - 2015/7/25

N2 - Abstract We report a simple processing method to simultaneously improve the efficiency and stability of organic solar cells (OSCs). Poly(4-styrene sulfonate)-doped poly(3,4-ethylenedioxy-thiophene (PEDOT:PSS), widely used as hole transport layer (HTL) in OSCs, tends to accelerate the degradation of devices because of its hygroscopic and acidic properties. In this regard, we have modified PEDOT:PSS to reduce its hygroscopic and acidic properties through a condensation reaction between PEDOT:PSS and poly(ethylene glycol) methyl ether (PEGME) in order to improve the efficiency and stability of OSCs. As a result, the power conversion efficiency (PCE) increased by 21%, from 2.57% up to 3.11%. A better energy level alignment by the reduced work function of the modified PEDOT:PSS with a highest occupied molecular orbital (HOMO) level of poly(3-hexylthiophene-2,5-diyl) (P3HT) is considered the origin of the improved the efficiency. The half-life of OSCs with PEDOT:PSS modified with PEGME buffer layer also increased up to 3.5 times compared to that of devices with pristine PEDOT:PSS buffer layer.

AB - Abstract We report a simple processing method to simultaneously improve the efficiency and stability of organic solar cells (OSCs). Poly(4-styrene sulfonate)-doped poly(3,4-ethylenedioxy-thiophene (PEDOT:PSS), widely used as hole transport layer (HTL) in OSCs, tends to accelerate the degradation of devices because of its hygroscopic and acidic properties. In this regard, we have modified PEDOT:PSS to reduce its hygroscopic and acidic properties through a condensation reaction between PEDOT:PSS and poly(ethylene glycol) methyl ether (PEGME) in order to improve the efficiency and stability of OSCs. As a result, the power conversion efficiency (PCE) increased by 21%, from 2.57% up to 3.11%. A better energy level alignment by the reduced work function of the modified PEDOT:PSS with a highest occupied molecular orbital (HOMO) level of poly(3-hexylthiophene-2,5-diyl) (P3HT) is considered the origin of the improved the efficiency. The half-life of OSCs with PEDOT:PSS modified with PEGME buffer layer also increased up to 3.5 times compared to that of devices with pristine PEDOT:PSS buffer layer.

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JO - Organic Electronics: physics, materials, applications

JF - Organic Electronics: physics, materials, applications

SN - 1566-1199

M1 - 3184

ER -

Simultaneous enhancement of the efficiency and stability of organic solar cells using PEDOT:PSS grafted with a PEGME buffer layer

Abstract

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