arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.5428cond-mat.mtrl-sci
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逐层转移调控石墨烯基光电池的高开路电压

High Open-circuit Voltage of Graphene-Based Photovoltaic Cells Modulated by Layer-by-Layer Transfer

Kyuwook Ihm, Kyung-jae Lee, Jong Tae Lim, Jae Wook Kwon, Tai-Hee Kang, Sukmin Chung, Sukang Bae, Jin Ho Kim, Byung Hee Hong, Geun Young Yeom

摘要:

石墨烯以其优异的电子性能在未来的纳米电子器件中显示出巨大的应用前景。此外,其令人印象深刻的光学特性一直吸引着研究人员的兴趣,最近,嵌入了几层石墨烯(FLG)的异质结结构的光伏效应已经得到证实。在这里,我们报告的石墨烯半导体结的光伏响应和控制的开路电压(Voc)与不同数量的石墨烯层。在通过化学生长的石墨烯层的逐层转移制备的FLG中通过原位退火去除可吸附的污染物之后,FLG的功函数随着石墨烯层的增加而连续增加,尽管层间堆叠是随机的,导致FLG/Si界面的光伏行为的调制。这里观察到的表面光伏效应显示了FLG异质结系统中深度方向上的电子重新排列,表明利用FLG优异的透明度和柔性的太阳能器件的未来潜力。

英文摘要:

Graphene has shown great application opportunities in future nanoelectronic devices due to its outstanding electronic properties. Moreover, its impressive optical properties 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 report the photovoltaic response of graphene-semiconductor junctions and the controlled open-circuit voltage (Voc) with varying 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. The surface photovoltaic effects observed here show an electronic realignment in the depth direction in the FLG heterojunction systems, indicating future potential toward solar devices utilizing the excellent transparency and flexibility of FLG.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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