中国物理B ›› 2023, Vol. 32 ›› Issue (4): 48401-048401.doi: 10.1088/1674-1056/acb768

• • 上一篇    下一篇

Adaptive genetic algorithm-based design of gamma-graphyne nanoribbon incorporating diamond-shaped segment with high thermoelectric conversion efficiency

Jingyuan Lu(陆静远)1,2,†, Chunfeng Cui(崔春凤)1,2,†, Tao Ouyang(欧阳滔)1,2,‡, Jin Li(李金)1,2, Chaoyu He(何朝宇)1,2, Chao Tang(唐超)1,2,§, and Jianxin Zhong(钟建新)1,2   

  1. 1 School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China;
    2 Hunan Key Laboratory for Micro-Nano Energy Materials and Device, Xiangtan University, Xiangtan 411105, China
  • 收稿日期:2022-12-06 修回日期:2023-01-04 接受日期:2023-01-31 出版日期:2023-03-10 发布日期:2023-03-14
  • 通讯作者: Tao Ouyang, Chao Tang E-mail:ouyangtao@xtu.edu.cn;tang_chao@xtu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11974300, 11974299, and 12074150), the Natural Science Foundation of Hunan Province, China (Grant No. 2021JJ30645), Scientific Research Fund of Hunan Provincial Education Department (Grant Nos. 20K127, 20A503, and 20B582), Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT13093), the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX20220544), Youth Science and Technology Talent Project of Hunan Province, China (Grant No. 2022RC1197).

Adaptive genetic algorithm-based design of gamma-graphyne nanoribbon incorporating diamond-shaped segment with high thermoelectric conversion efficiency

Jingyuan Lu(陆静远)1,2,†, Chunfeng Cui(崔春凤)1,2,†, Tao Ouyang(欧阳滔)1,2,‡, Jin Li(李金)1,2, Chaoyu He(何朝宇)1,2, Chao Tang(唐超)1,2,§, and Jianxin Zhong(钟建新)1,2   

  1. 1 School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China;
    2 Hunan Key Laboratory for Micro-Nano Energy Materials and Device, Xiangtan University, Xiangtan 411105, China
  • Received:2022-12-06 Revised:2023-01-04 Accepted:2023-01-31 Online:2023-03-10 Published:2023-03-14
  • Contact: Tao Ouyang, Chao Tang E-mail:ouyangtao@xtu.edu.cn;tang_chao@xtu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11974300, 11974299, and 12074150), the Natural Science Foundation of Hunan Province, China (Grant No. 2021JJ30645), Scientific Research Fund of Hunan Provincial Education Department (Grant Nos. 20K127, 20A503, and 20B582), Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT13093), the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX20220544), Youth Science and Technology Talent Project of Hunan Province, China (Grant No. 2022RC1197).

RichHTML

3

PDF (PC)

177

赞

补充材料

1

摘要： The gamma-graphyne nanoribbons ($\gamma $-GYNRs) incorporating diamond-shaped segment (DSSs) with excellent thermoelectric properties are systematically investigated by combining nonequilibrium Green's functions with adaptive genetic algorithm. Our calculations show that the adaptive genetic algorithm is efficient and accurate in the process of identifying structures with excellent thermoelectric performance. In multiple rounds, an average of 476 candidates (only 2.88% of all 16512 candidate structures) are calculated to obtain the structures with extremely high thermoelectric conversion efficiency. The room temperature thermoelectric figure of merit ($ZT$) of the optimal $\gamma $-GYNR incorporating DSSs is 1.622, which is about 5.4 times higher than that of pristine $\gamma $-GYNR (length 23.693 nm and width 2.660 nm). The significant improvement of thermoelectric performance of the optimal $\gamma $-GYNR is mainly attributed to the maximum balance of inhibition of thermal conductance (proactive effect) and reduction of thermal power factor (side effect). Moreover, through exploration of the main variables affecting the genetic algorithm, it is revealed that the efficiency of the genetic algorithm can be improved by optimizing the initial population gene pool, selecting a higher individual retention rate and a lower mutation rate. The results presented in this paper validate the effectiveness of genetic algorithm in accelerating the exploration of $\gamma $-GYNRs with high thermoelectric conversion efficiency, and could provide a new development solution for carbon-based thermoelectric materials.

关键词: adaptive genetic algorithm, thermoelectric material, diamond-like quantum dots, gamma-graphyne nanoribbon

Abstract: The gamma-graphyne nanoribbons ($\gamma $-GYNRs) incorporating diamond-shaped segment (DSSs) with excellent thermoelectric properties are systematically investigated by combining nonequilibrium Green's functions with adaptive genetic algorithm. Our calculations show that the adaptive genetic algorithm is efficient and accurate in the process of identifying structures with excellent thermoelectric performance. In multiple rounds, an average of 476 candidates (only 2.88% of all 16512 candidate structures) are calculated to obtain the structures with extremely high thermoelectric conversion efficiency. The room temperature thermoelectric figure of merit ($ZT$) of the optimal $\gamma $-GYNR incorporating DSSs is 1.622, which is about 5.4 times higher than that of pristine $\gamma $-GYNR (length 23.693 nm and width 2.660 nm). The significant improvement of thermoelectric performance of the optimal $\gamma $-GYNR is mainly attributed to the maximum balance of inhibition of thermal conductance (proactive effect) and reduction of thermal power factor (side effect). Moreover, through exploration of the main variables affecting the genetic algorithm, it is revealed that the efficiency of the genetic algorithm can be improved by optimizing the initial population gene pool, selecting a higher individual retention rate and a lower mutation rate. The results presented in this paper validate the effectiveness of genetic algorithm in accelerating the exploration of $\gamma $-GYNRs with high thermoelectric conversion efficiency, and could provide a new development solution for carbon-based thermoelectric materials.

Key words: adaptive genetic algorithm, thermoelectric material, diamond-like quantum dots, gamma-graphyne nanoribbon

中图分类号:  (Thermoelectric, electrogasdynamic and other direct energy conversion)

  • 84.60.Rb
72.15.Jf (Thermoelectric and thermomagnetic effects)