High performance inverted polymer solar cells using ultrathin atomic layer deposited TiO2 films

Hyun Soo Cho; Nara Shin; Kyungkon Kim; Bong Soo Kim; Do Heyoung Kim

doi:10.1016/j.synthmet.2015.06.001

High performance inverted polymer solar cells using ultrathin atomic layer deposited TiO₂ films

Hyun Soo Cho, Nara Shin, Kyungkon Kim, Bong Soo Kim, Do Heyoung Kim

Department of Chemistry & Nanoscience

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

13 Scopus citations

Abstract

Abstract Photovoltaic properties of inverted type polymer solar cells (PSCs) using ultrathin TiO₂ layers as an adjuvant electron collecting layer were investigated. To prepare the ultrathin (2.5 nm) TiO₂ layers on top of TiO₂ nanoparticles, atomic layer deposition (ALD) process was conducted at 125, 175, and 200 C. The addition of ALD TiO₂ on nanoparticulated TiO₂ effectively enhanced the photovoltaic performances of inverted organic solar cells. The inverted PSC device with the thin 200 C-ALD TiO₂ layers showed the highest power conversion efficiency of 3.50%, which is an enhancement of approximately 30% compared to the cells without the ALD TiO₂ layer (PCE = 2.72%). This work demonstrates that the ALD process plays a critical role in the enhancement of electron extraction efficiency with treating the surface defects of the TiO₂ nanoparticles.

Original language	English
Article number	14984
Pages (from-to)	31-34
Number of pages	4
Journal	Synthetic Metals
Volume	207
DOIs	https://doi.org/10.1016/j.synthmet.2015.06.001
State	Published - 14 Jun 2015

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education, Science and Technology, Korea (NRF-2013R1A1A4A01013486).

Publisher Copyright:
© 2015. Elsevier B.V.

Keywords

Atomic layer deposition
Electron extraction layer
Inverted photovoltaic devices
Power conversion efficiency
Titanium nanoparticles

Access to Document

10.1016/j.synthmet.2015.06.001

Cite this

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title = "High performance inverted polymer solar cells using ultrathin atomic layer deposited TiO2 films",

abstract = "Abstract Photovoltaic properties of inverted type polymer solar cells (PSCs) using ultrathin TiO2 layers as an adjuvant electron collecting layer were investigated. To prepare the ultrathin (2.5 nm) TiO2 layers on top of TiO2 nanoparticles, atomic layer deposition (ALD) process was conducted at 125, 175, and 200 C. The addition of ALD TiO2 on nanoparticulated TiO2 effectively enhanced the photovoltaic performances of inverted organic solar cells. The inverted PSC device with the thin 200 C-ALD TiO2 layers showed the highest power conversion efficiency of 3.50%, which is an enhancement of approximately 30% compared to the cells without the ALD TiO2 layer (PCE = 2.72%). This work demonstrates that the ALD process plays a critical role in the enhancement of electron extraction efficiency with treating the surface defects of the TiO2 nanoparticles.",

keywords = "Atomic layer deposition, Electron extraction layer, Inverted photovoltaic devices, Power conversion efficiency, Titanium nanoparticles",

author = "Cho, {Hyun Soo} and Nara Shin and Kyungkon Kim and Kim, {Bong Soo} and Kim, {Do Heyoung}",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education, Science and Technology, Korea (NRF-2013R1A1A4A01013486). Publisher Copyright: {\textcopyright} 2015. Elsevier B.V.",

year = "2015",

month = jun,

day = "14",

doi = "10.1016/j.synthmet.2015.06.001",

language = "English",

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journal = "Synthetic Metals",

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T1 - High performance inverted polymer solar cells using ultrathin atomic layer deposited TiO2 films

AU - Cho, Hyun Soo

AU - Shin, Nara

AU - Kim, Kyungkon

AU - Kim, Bong Soo

AU - Kim, Do Heyoung

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education, Science and Technology, Korea (NRF-2013R1A1A4A01013486). Publisher Copyright: © 2015. Elsevier B.V.

PY - 2015/6/14

Y1 - 2015/6/14

N2 - Abstract Photovoltaic properties of inverted type polymer solar cells (PSCs) using ultrathin TiO2 layers as an adjuvant electron collecting layer were investigated. To prepare the ultrathin (2.5 nm) TiO2 layers on top of TiO2 nanoparticles, atomic layer deposition (ALD) process was conducted at 125, 175, and 200 C. The addition of ALD TiO2 on nanoparticulated TiO2 effectively enhanced the photovoltaic performances of inverted organic solar cells. The inverted PSC device with the thin 200 C-ALD TiO2 layers showed the highest power conversion efficiency of 3.50%, which is an enhancement of approximately 30% compared to the cells without the ALD TiO2 layer (PCE = 2.72%). This work demonstrates that the ALD process plays a critical role in the enhancement of electron extraction efficiency with treating the surface defects of the TiO2 nanoparticles.

AB - Abstract Photovoltaic properties of inverted type polymer solar cells (PSCs) using ultrathin TiO2 layers as an adjuvant electron collecting layer were investigated. To prepare the ultrathin (2.5 nm) TiO2 layers on top of TiO2 nanoparticles, atomic layer deposition (ALD) process was conducted at 125, 175, and 200 C. The addition of ALD TiO2 on nanoparticulated TiO2 effectively enhanced the photovoltaic performances of inverted organic solar cells. The inverted PSC device with the thin 200 C-ALD TiO2 layers showed the highest power conversion efficiency of 3.50%, which is an enhancement of approximately 30% compared to the cells without the ALD TiO2 layer (PCE = 2.72%). This work demonstrates that the ALD process plays a critical role in the enhancement of electron extraction efficiency with treating the surface defects of the TiO2 nanoparticles.

KW - Atomic layer deposition

KW - Electron extraction layer

KW - Inverted photovoltaic devices

KW - Power conversion efficiency

KW - Titanium nanoparticles

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