The annealing effects of tungsten oxide interlayer based on organic photovoltaic cells

Sang Bin Lee; Jin Ho Beak; Byung Hyun Kang; Ki Young Dong; Youn Yeol Yu; Yang Doo Lee; Byeong Kwon Ju

doi:10.1016/j.solmat.2013.05.020

The annealing effects of tungsten oxide interlayer based on organic photovoltaic cells

Sang Bin Lee, Jin Ho Beak, Byung Hyun Kang, Ki Young Dong, Youn Yeol Yu, Yang Doo Lee, Byeong Kwon Ju

School of Electrical Engineering

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

25 Citations (Scopus)

Abstract

We investigated the effect of tungsten oxide (WO₃) interlayer as a hole collection layer on the performance of organic photovoltaic cells according to the thickness and temperature of the interlayer. The characteristics of organic photovoltaic cells such as fill factor, current density, and open circuit voltage are continuously improved by increasing the temperature of the WO₃ interlayer. The surface of a treated WO ₃ film promotes the crystallization of P3HT because a treated WO ₃ film is more hydrophobic than a pristine WO₃ film. Furthermore, the energy barrier between P3HT and the WO₃ interlayer is minimized since the work function of the WO₃ film after annealing progressively increases until a hole can be smoothly transferred. Therefore, organic photovoltaic cells using an interlayer of treated WO₃ film have higher hole mobility and better efficiency. The efficiency of an organic photovoltaic cell with a 40 nm-thick WO₃ interlayer is significantly enhanced from 0.94 to 3.04% as the temperature changes from room temperature to 350 C under AM 1.5G illumination.

Original language	English
Pages (from-to)	203-208
Number of pages	6
Journal	Solar Energy Materials and Solar Cells
Volume	117
DOIs	https://doi.org/10.1016/j.solmat.2013.05.020
Publication status	Published - 2013

Keywords

Organic photovoltaic cell
Organic solar cell
Thermal annealing
Tungsten oxide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.solmat.2013.05.020

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title = "The annealing effects of tungsten oxide interlayer based on organic photovoltaic cells",

abstract = "We investigated the effect of tungsten oxide (WO3) interlayer as a hole collection layer on the performance of organic photovoltaic cells according to the thickness and temperature of the interlayer. The characteristics of organic photovoltaic cells such as fill factor, current density, and open circuit voltage are continuously improved by increasing the temperature of the WO3 interlayer. The surface of a treated WO 3 film promotes the crystallization of P3HT because a treated WO 3 film is more hydrophobic than a pristine WO3 film. Furthermore, the energy barrier between P3HT and the WO3 interlayer is minimized since the work function of the WO3 film after annealing progressively increases until a hole can be smoothly transferred. Therefore, organic photovoltaic cells using an interlayer of treated WO3 film have higher hole mobility and better efficiency. The efficiency of an organic photovoltaic cell with a 40 nm-thick WO3 interlayer is significantly enhanced from 0.94 to 3.04% as the temperature changes from room temperature to 350 C under AM 1.5G illumination.",

keywords = "Organic photovoltaic cell, Organic solar cell, Thermal annealing, Tungsten oxide",

author = "Lee, {Sang Bin} and {Ho Beak}, Jin and Kang, {Byung Hyun} and Dong, {Ki Young} and Yu, {Youn Yeol} and {Doo Lee}, Yang and Ju, {Byeong Kwon}",

note = "Funding Information: This work was supported by the RFID R&D program of MKE/KEIT. (10035225, Development of core technology for high performance AMOLED on plastic). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

doi = "10.1016/j.solmat.2013.05.020",

language = "English",

volume = "117",

pages = "203--208",

journal = "Solar Energy Materials and Solar Cells",

issn = "0927-0248",

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T1 - The annealing effects of tungsten oxide interlayer based on organic photovoltaic cells

AU - Lee, Sang Bin

AU - Ho Beak, Jin

AU - Kang, Byung Hyun

AU - Dong, Ki Young

AU - Yu, Youn Yeol

AU - Doo Lee, Yang

AU - Ju, Byeong Kwon

N1 - Funding Information: This work was supported by the RFID R&D program of MKE/KEIT. (10035225, Development of core technology for high performance AMOLED on plastic). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013

Y1 - 2013

N2 - We investigated the effect of tungsten oxide (WO3) interlayer as a hole collection layer on the performance of organic photovoltaic cells according to the thickness and temperature of the interlayer. The characteristics of organic photovoltaic cells such as fill factor, current density, and open circuit voltage are continuously improved by increasing the temperature of the WO3 interlayer. The surface of a treated WO 3 film promotes the crystallization of P3HT because a treated WO 3 film is more hydrophobic than a pristine WO3 film. Furthermore, the energy barrier between P3HT and the WO3 interlayer is minimized since the work function of the WO3 film after annealing progressively increases until a hole can be smoothly transferred. Therefore, organic photovoltaic cells using an interlayer of treated WO3 film have higher hole mobility and better efficiency. The efficiency of an organic photovoltaic cell with a 40 nm-thick WO3 interlayer is significantly enhanced from 0.94 to 3.04% as the temperature changes from room temperature to 350 C under AM 1.5G illumination.

AB - We investigated the effect of tungsten oxide (WO3) interlayer as a hole collection layer on the performance of organic photovoltaic cells according to the thickness and temperature of the interlayer. The characteristics of organic photovoltaic cells such as fill factor, current density, and open circuit voltage are continuously improved by increasing the temperature of the WO3 interlayer. The surface of a treated WO 3 film promotes the crystallization of P3HT because a treated WO 3 film is more hydrophobic than a pristine WO3 film. Furthermore, the energy barrier between P3HT and the WO3 interlayer is minimized since the work function of the WO3 film after annealing progressively increases until a hole can be smoothly transferred. Therefore, organic photovoltaic cells using an interlayer of treated WO3 film have higher hole mobility and better efficiency. The efficiency of an organic photovoltaic cell with a 40 nm-thick WO3 interlayer is significantly enhanced from 0.94 to 3.04% as the temperature changes from room temperature to 350 C under AM 1.5G illumination.

KW - Organic photovoltaic cell

KW - Organic solar cell

KW - Thermal annealing

KW - Tungsten oxide

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The annealing effects of tungsten oxide interlayer based on organic photovoltaic cells

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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