Efficient solution-processed small-molecule solar cells with titanium suboxide as an electric adhesive layer

Byoung Hoon Lee; Jessica Coughlin; Geunjin Kim; Guillermo C. Bazan; Kwanghee Lee

doi:10.1063/1.4880095

Efficient solution-processed small-molecule solar cells with titanium suboxide as an electric adhesive layer

Byoung Hoon Lee, Jessica Coughlin, Geunjin Kim, Guillermo C. Bazan, Kwanghee Lee

Department of Chemical Engineering & Materials Science

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

10 Scopus citations

Abstract

We demonstrate efficient and air-stable small-molecule bulk heterojunction (SM BHJ) solar cells by introducing titanium suboxide (TiO_x) between the active layer and the cathode as an electric adhesive layer. The SM BHJ solar cell with the TiO_x interlayer exhibits improved power conversion efficiency of 6.4% as well as greatly enhanced device lifetime. Analysis of the dark diode characteristics and comparison of the current density-voltage characteristics upon heat annealing indicate that the TiO_x interlayer improves the electrical contact between the active layer and the cathode, thereby resulting in efficient sweep-out of photogenerated charge carriers.

Original language	English
Article number	213305
Journal	Applied Physics Letters
Volume	104
Issue number	21
DOIs	https://doi.org/10.1063/1.4880095
State	Published - 26 May 2014

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title = "Efficient solution-processed small-molecule solar cells with titanium suboxide as an electric adhesive layer",

abstract = "We demonstrate efficient and air-stable small-molecule bulk heterojunction (SM BHJ) solar cells by introducing titanium suboxide (TiOx) between the active layer and the cathode as an electric adhesive layer. The SM BHJ solar cell with the TiOx interlayer exhibits improved power conversion efficiency of 6.4% as well as greatly enhanced device lifetime. Analysis of the dark diode characteristics and comparison of the current density-voltage characteristics upon heat annealing indicate that the TiOx interlayer improves the electrical contact between the active layer and the cathode, thereby resulting in efficient sweep-out of photogenerated charge carriers.",

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AU - Lee, Byoung Hoon

AU - Coughlin, Jessica

AU - Kim, Geunjin

AU - Bazan, Guillermo C.

AU - Lee, Kwanghee

PY - 2014/5/26

Y1 - 2014/5/26

N2 - We demonstrate efficient and air-stable small-molecule bulk heterojunction (SM BHJ) solar cells by introducing titanium suboxide (TiOx) between the active layer and the cathode as an electric adhesive layer. The SM BHJ solar cell with the TiOx interlayer exhibits improved power conversion efficiency of 6.4% as well as greatly enhanced device lifetime. Analysis of the dark diode characteristics and comparison of the current density-voltage characteristics upon heat annealing indicate that the TiOx interlayer improves the electrical contact between the active layer and the cathode, thereby resulting in efficient sweep-out of photogenerated charge carriers.

AB - We demonstrate efficient and air-stable small-molecule bulk heterojunction (SM BHJ) solar cells by introducing titanium suboxide (TiOx) between the active layer and the cathode as an electric adhesive layer. The SM BHJ solar cell with the TiOx interlayer exhibits improved power conversion efficiency of 6.4% as well as greatly enhanced device lifetime. Analysis of the dark diode characteristics and comparison of the current density-voltage characteristics upon heat annealing indicate that the TiOx interlayer improves the electrical contact between the active layer and the cathode, thereby resulting in efficient sweep-out of photogenerated charge carriers.

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JO - Applied Physics Letters

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Efficient solution-processed small-molecule solar cells with titanium suboxide as an electric adhesive layer

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