Number of graphene layers as a modulator of the open-circuit voltage of graphene-based solar cell

被引：75

作者：

Ihm, Kyuwook ^{[1
]}

Lim, Jong Tae ^{[2
]}

Lee, Kyoung-Jae ^{[3
]}

Kwon, Jae Wook ^{[2
]}

Kang, Tai-Hee ^{[1
]}

Chung, Sukmin ^{[3
]}

Bae, Sukang ^{[4
]}

Kim, Jin Ho ^{[4
]}

Hong, Byung Hee ^{[4
]}

Yeom, Geun Young ^{[2
]}

机构：

[1] Pohang Accelerator Lab, Pohang 790784, Kyungbuk, South Korea

[2] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 440746, South Korea

[3] POSTECH, Dept Phys, Pohang 790784, Kyungbuk, South Korea

[4] SKKU Adv Inst Nanotechnol, Dept Chem, Suwon 440746, South Korea

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 03期

关键词：

annealing; graphene; photovoltaic effects; silicon; solar cells; work function; PHOTOEMISSION;

D O I：

10.1063/1.3464319

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Impressive optical properties of graphene have been attracting the interest of researchers, and, recently, the photovoltaic effects of a heterojunction structure embedded with few layer graphene (FLG) have been demonstrated. Here, we show the direct dependence of open-circuit voltage (V-oc) on numbers of graphene layers. After unavoidably adsorbed contaminants were removed from the FLGs, by means of in situ annealing, prepared by layer-by-layer transfer of the chemically grown graphene layer, the work functions of FLGs showed a sequential increase as the graphene layers increase, despite of random interlayer-stacking, resulting in the modulation of photovoltaic behaviors of FLGs/Si interfaces. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3464319]

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