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journal article·2021-05

Graphene‐Nanorod Enhanced Quasi‐Van Der Waals Epitaxy for High Indium Composition Nitride Films

Shuo Zhang, Bingyao Liu, Fang Ren, Yue Yin, Yunyu Wang, Zhaolong Chen, Bei Jiang, Bingzhi Liu, Zhetong Liu, Jingyu Sun, Meng Liang, Jianchang Yan, Tongbo Wei, Xiaoyan Yi, Junxi Wang, Jinmin Li, Peng Gao, Zhongfan Liu, Zhiqiang Liu

Small· Volume 17· Issue 19
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Source abstract

Abstract

Abstract The nitride films with high indium (In) composition play a crucial role in the fabrication of In‐rich InGaN‐based optoelectronic devices. However, a major limitation is In incorporation requiring a low temperature during growth at the expense of nitride dissociation. Here, to overcome this limitation, a strain‐modulated growth method, namely the graphene (Gr)‐nanorod (NR) enhanced quasi‐van der Waals epitaxy, is proposed to increase the In composition in InGaN alloy. The lattice transparency of Gr enables constraint of in‐plane orientation of nitride film and epitaxial relationships at the heterointerface. The Gr interlayer together with NRs buffer layer substantially reduces the stress of the GaN film by 74.4%, from 0.9 to 0.23 GPa, and thus increases the In incorporation by 30.7%. The first principles calculations confirm that the release of strain accounts for the dramatic improvement. The photoluminescence peak of multiple quantum wells shifts from 461 to 497 nm and the functionally small‐sized cyan light‐emitting diodes of 7 × 9 mil2 are demonstrated. These findings provide an efficient approach for the growth of In‐rich InGaN film and extend the applications of nitrides in advanced optoelectronic, photovoltaic, and thermoelectric devices.
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Research context

Metals & alloysNanomaterialsElectronic materials

OpenAlex topics: GaN-based semiconductor devices and materials · Metal and Thin Film Mechanics · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Research and Development Center for Semiconductor Lighting Technology Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics Peking University Beijing 100871 China

Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 China

Center for Nanochemistry (CNC) Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Beijing Graphene Institute (BGI) Beijing 100095 China

College of Energy Soochow Institute for Energy and Materials Innovations Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies Soochow University Suzhou 215006 China

Collaborative Innovation Center of Quantum Matter Beijing 100871 China

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