Snow cleaning of substrates increases yield of large-area organic photovoltaics

被引：27

作者：

Wang, Nana ^{[1
,2
]}

Zimmerman, Jeramy D. ^{[1
]}

Tong, Xiaoran ^{[3
]}

Xiao, Xin ^{[1
]}

Yu, Junsheng ^{[2
]}

Forrest, Stephen R. ^{[1
,3
,4
]}

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[2] Univ Elect Sci & Technol China, Dept Optoelect Informat, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[3] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[4] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 13期

关键词：

SOLAR-CELLS;

D O I：

10.1063/1.4754690

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate large-area organic photovoltaic cells (OPVs) based on boron-subphthalocyanine chloride (SubPc)/C-60 and 2,4-bis[4-(N,N-diphenylamino)-2,6 dihydroxyphenyl] squaraine/C-60 heterojunctions on substrates "snow-cleaned" with a jet of mixed-phase CO2. Snow cleaning reduces particulates on the indium-tin-oxide (ITO)-coated glass substrates, thereby reducing device shorts and shunt paths. Snow cleaning improves yield of 1.44 cm(2) SubPc/C-60 OPV cells from zero for conventionally solvent-cleaned substrates to similar to 70%. The standard deviation of power conversion efficiency for a population of 19 snow-cleaned devices is <4.0%. By using a sub-electrode structure, we obtain a power conversion efficiency of 2.21%+/- 0.05% for 6.25 cm(2) SubPc/C-60 devices, compared to 2.69%+/- 0.03%, for 0.008 cm(2) devices, with the efficiency decrease due to series resistance of the ITO. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754690]

引用

页数：4

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