Transient photovoltage and dark current analysis on enhanced open-circuit voltage of polymer solar cells with hole blocking TiO2 nanoparticle interfacial layer

Youn Su Kim; Taehee Kim; Bongsoo Kim; Doh Kwon Lee; Honggon Kim; Byeong Kwon Ju; Kyungkon Kim

doi:10.1016/j.orgel.2013.04.016

Transient photovoltage and dark current analysis on enhanced open-circuit voltage of polymer solar cells with hole blocking TiO₂ nanoparticle interfacial layer

Youn Su Kim, Taehee Kim, Bongsoo Kim, Doh Kwon Lee, Honggon Kim, Byeong Kwon Ju, Kyungkon Kim

Department of Chemistry & Nanoscience

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

27 Scopus citations

Abstract

The open-circuit voltage of bulk heterojunction polymer solar cells utilizing 1,8-diiodooctane (DIO) as a processing additive was greatly improved by using an organic layer coated TiO₂ nanoparticle interfacial layer inserted between the active layer and the Al electrode. The transient photovoltage measurement revealed that there was significant non-geminate recombination at the DIO-processed active layer/Al electrode interface. Reduced open-circuit voltage (V_OC) of the photovoltaic devices and high water contact angle of the DIO-processed active layer showed that the DIO-processed active layer has an undesirable surface composition for the electron collection. The organic layer coated TiO₂ nanoparticle interfacial layer effectively prevented the non-geminate recombination at the active layer/Al interface. As a result, we were able to significantly improve the V_OC and power conversion efficiency from 0.46 V and 2.13% to 0.62 V and 3.95%, respectively.

Original language	English
Pages (from-to)	1749-1754
Number of pages	6
Journal	Organic Electronics
Volume	14
Issue number	7
DOIs	https://doi.org/10.1016/j.orgel.2013.04.016
State	Published - Jul 2013

Bibliographical note

Funding Information:
This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (2008-2000092), by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education and by KRCF (Korea Research Council of Fundamental Science &Science and Technology and Technology) and KIST (Korea Institute of Science & Technology) for‘‘NAP (National Agenda Project) program”.

Keywords

Polymer solar cells
Processing additive
Transient photovoltage
Vertical phase separation

Access to Document

10.1016/j.orgel.2013.04.016

Cite this

@article{6720f2a80d1c4ceb904c3d60241c5328,

title = "Transient photovoltage and dark current analysis on enhanced open-circuit voltage of polymer solar cells with hole blocking TiO2 nanoparticle interfacial layer",

abstract = "The open-circuit voltage of bulk heterojunction polymer solar cells utilizing 1,8-diiodooctane (DIO) as a processing additive was greatly improved by using an organic layer coated TiO2 nanoparticle interfacial layer inserted between the active layer and the Al electrode. The transient photovoltage measurement revealed that there was significant non-geminate recombination at the DIO-processed active layer/Al electrode interface. Reduced open-circuit voltage (VOC) of the photovoltaic devices and high water contact angle of the DIO-processed active layer showed that the DIO-processed active layer has an undesirable surface composition for the electron collection. The organic layer coated TiO2 nanoparticle interfacial layer effectively prevented the non-geminate recombination at the active layer/Al interface. As a result, we were able to significantly improve the VOC and power conversion efficiency from 0.46 V and 2.13% to 0.62 V and 3.95%, respectively.",

keywords = "Polymer solar cells, Processing additive, Transient photovoltage, Vertical phase separation",

author = "Kim, {Youn Su} and Taehee Kim and Bongsoo Kim and Lee, {Doh Kwon} and Honggon Kim and Ju, {Byeong Kwon} and Kyungkon Kim",

note = "Funding Information: This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (2008-2000092), by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education and by KRCF (Korea Research Council of Fundamental Science &Science and Technology and Technology) and KIST (Korea Institute of Science & Technology) for{\textquoteleft}{\textquoteleft}NAP (National Agenda Project) program”.",

year = "2013",

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doi = "10.1016/j.orgel.2013.04.016",

language = "English",

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journal = "Organic Electronics",

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AU - Kim, Youn Su

AU - Kim, Taehee

AU - Kim, Bongsoo

AU - Lee, Doh Kwon

AU - Kim, Honggon

AU - Ju, Byeong Kwon

AU - Kim, Kyungkon

N1 - Funding Information: This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (2008-2000092), by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education and by KRCF (Korea Research Council of Fundamental Science &Science and Technology and Technology) and KIST (Korea Institute of Science & Technology) for‘‘NAP (National Agenda Project) program”.

PY - 2013/7

Y1 - 2013/7

N2 - The open-circuit voltage of bulk heterojunction polymer solar cells utilizing 1,8-diiodooctane (DIO) as a processing additive was greatly improved by using an organic layer coated TiO2 nanoparticle interfacial layer inserted between the active layer and the Al electrode. The transient photovoltage measurement revealed that there was significant non-geminate recombination at the DIO-processed active layer/Al electrode interface. Reduced open-circuit voltage (VOC) of the photovoltaic devices and high water contact angle of the DIO-processed active layer showed that the DIO-processed active layer has an undesirable surface composition for the electron collection. The organic layer coated TiO2 nanoparticle interfacial layer effectively prevented the non-geminate recombination at the active layer/Al interface. As a result, we were able to significantly improve the VOC and power conversion efficiency from 0.46 V and 2.13% to 0.62 V and 3.95%, respectively.

AB - The open-circuit voltage of bulk heterojunction polymer solar cells utilizing 1,8-diiodooctane (DIO) as a processing additive was greatly improved by using an organic layer coated TiO2 nanoparticle interfacial layer inserted between the active layer and the Al electrode. The transient photovoltage measurement revealed that there was significant non-geminate recombination at the DIO-processed active layer/Al electrode interface. Reduced open-circuit voltage (VOC) of the photovoltaic devices and high water contact angle of the DIO-processed active layer showed that the DIO-processed active layer has an undesirable surface composition for the electron collection. The organic layer coated TiO2 nanoparticle interfacial layer effectively prevented the non-geminate recombination at the active layer/Al interface. As a result, we were able to significantly improve the VOC and power conversion efficiency from 0.46 V and 2.13% to 0.62 V and 3.95%, respectively.

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KW - Vertical phase separation

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