半导体激光无线传能中光伏电池转换效率

李巍; 吴凌远; 王伟平; 张家雷; 刘国栋; 张大勇

doi:10.11884/HPLPB201830.180097

半导体激光无线传能中光伏电池转换效率

doi: 10.11884/HPLPB201830.180097

李巍^{1, 2,},
吴凌远^{1, 2, ,},
王伟平^{1, 2},
张家雷^{1, 2},
刘国栋^{1, 2},
张大勇^{1, 2}

1.
中国工程物理研究院流体物理研究所, 四川绵阳 621900
2.
中国工程物理研究院高能激光科学与技术重点实验室, 四川绵阳 621900

基金项目:

国家自然科学基金委员会-中国工程物理研究院联合基金项目 U1630125

详细信息

作者简介:
李巍(1994—), 男，硕士研究生，从事激光应用技术研究; vleefoxtrot@outlook.com

通讯作者:
吴凌远(1986—)，男，博士，助理研究员，从事光电材料及激光效应研究; wubaly@163.com

中图分类号: O439
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- 被引次数: 0
出版历程
- 收稿日期: 2018-04-03
- 修回日期: 2018-09-06
- 刊出日期: 2018-11-15

Power conversion efficiency of photovoltaic cells in semiconductor laser wireless power transmission

Li Wei^{1, 2
,},
Wu Lingyuan^{1, 2
, ,},
Wang Weiping^{1, 2},
Zhang Jialei^{1, 2},
Liu Guodong^{1, 2},
Zhang Dayong^{1, 2}

1.
Institute of Fluid Physics, CAEP, Mianyang 621900, China
2.
Key Laboratory of Science and Technology on High Energy Laser, CAEP, Mianyang 621900, China

摘要

摘要: 为选择合适的激光参量与光伏电池参量，以提高激光无线能量传输(LWPT)系统的能量转换效率，通过实验研究了LWPT系统中能量接收单元，也即光伏电池在半导体激光照射下的输出特性。通过波长为808 nm和915 nm的激光辐照GaAs和Si光伏电池，研究了不同激光功率密度、光伏电池温度、电池类型以及激光入射角度对光伏电池输出特性与能量转换效率的影响。实验中，在波长为808 nm的激光功率密度从0.06 W/cm²上升至0.37 W/cm²的过程中，Si电池的最大输出功率从0.12 W上升至0.32 W，能量转换效率从50.9%下降至21.2%；GaAs电池的最大输出功率从0.40 W上升到1.07 W，能量转换效率从57.9%下降至23.8%。随着激光功率密度的增加，光伏电池的输出功率先增加而后趋于饱和，但是高功率密度激光引起的电池温升会导致其光电转换效率的下降，所以激光功率密度的选择与光伏电池温度的控制是提高LWPT系统能量转换效率的关键因素。
- 激光无线能量传输 /
- 光伏电池 /
- 输出特性 /
- 能量转换效率 /
- 半导体激光器
Abstract: In order to choose the best laser parameters and the photovoltaic cells (PV cells) parameters to reach a high power conversion efficiency (PCE) of the laser wireless power transmission (LWPT) system, we experimentally studied the output characteristics of the receiving system, the PV cells, under laser irradiation. The GaAs and Si PV cells were irradiated by laser with wavelengths of 808 nm and 915 nm, and the output characteristics and PCE of the PV cells under different conditions were analyzed. These conditions include: laser power intensity, laser incidence angle, temperature and material of the PV cells. In the experiment, when 808 nm laser power intensity increased from 0.06 W/cm² to 0.37 W/cm², the maximum output power of Si PV cell increased from 0.12 W to 0.32 W, but its PCE decreased from 50.9% to 21.2%; the maximum output power of GaAs PV cell increased from 0.40 W to 1.07 W, but its PCE decreased from 57.9% to 23.8%. The experimental results show that with the increase of laser power density, the output power of PV cells increases at first and then tends to be stable, but the temperature rise caused by high power intensity laser will lead to the decrease of power conversion efficiency of PV cells. So, the selection of laser power intensity and the temperature control of PV cells are keys to increase the PCE of LWPT system.
- laser wireless power transmission /
- photovoltaic cell /
- output characteristic /
- power conversion efficiency /
- semiconductor laser

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图 1 实验设计光路图

Figure 1. Experimental design of beam path diagram

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图 2 激光与太阳光辐照下光伏电池的伏安特性曲线

Figure 2. I-V curve of photovoltaic cells under the irradiation of laser and solar light

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图 3 (a) 短路电流；(b)开路电压；(c)最大输出功率；(d)能量转换效率随入射激光功率密度的变化图

Figure 3. Laser intensity dependence of (a) short circuit current; (b)open circuit voltage; (c)maximum output power; (d) power conversion efficiency

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图 4 Si电池在不同功率密度与波长激光照射下的伏安特性曲线

Figure 4. I-V curves of Si PV cell under different irradiance

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图 5 Si电池的温升曲线

Figure 5. Temperature rise curves of Si photovoltaic cell

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图 6 (a) 短路电流；(b)开路电压；(c)填充因子；(d)能量转换效率随温度的变化图

Figure 6. Temperature dependence of (a) short circuit current; (b)open circuit voltage; (c)fill factor; (d) power conversion efficiency

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图 7 (a) 短路电流、开路电压；(b)能量转换效率随入射激光角度的变化图

Figure 7. Incident angle dependence of (a) short circuit current, open circuit voltage; (b) power conversion efficiency

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表 1 光伏电池的输出参数

Table 1. Output characteristics of photovoltaic(PV) cells

	power conversinon efficiency (PCE)/%	fill factor (FF)	P_max/W
Si, solar	17.4	0.728	0.069
Si, laser	40.8	0.613	0.179
GaAs, solar	18.4	0.684	0.221
GaAs, laser	48.1	0.664	0.632

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