Annealing of Thin-film Cadmium Telluride Photovoltaics Using Holographically Controlled Laser Processing

Annealing of Thin-film Cadmium Telluride Photovoltaics Using Holographically Controlled Laser Processing
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使用全息控制激光加工对薄膜碲化镉光伏器件进行退火

DOI:
10.1016/j.egypro.2016.11.320
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发表时间:
2016
期刊:
Energy Procedia
影响因子:
--
通讯作者:
Goffin N
Goffin N
中科院分区:
--
文献类型:
--
作者:
Goffin N

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基于CdTe的薄膜太阳能电池目前代表着发展最快的光伏技术之一,具有效率、能量回收时间和生命周期对环境影响的卓越组合。然而,目前的沉积后退火处理仍然是制造过程中的能量密集型步骤。提出了一种利用高功率半导体激光器(35W,808 nm)进行热后处理,并结合全息光学元件(HOE‘s)进行激光热流控制的新方法。激光用于退火的优势在于它能够选择性地只加热CdTe太阳能电池的表面;提高能源效率、处理速度和能量弹性。利用传热学模拟预测了不同激光照度分布对退火过程热循环的影响,并预测了最佳激光照度分布。对沉积和经MgCl2处理的近空间升华(CSS)CdTe样品进行了功率和处理速度的变化。用扫描电子显微镜、透射电子显微镜和X射线光电子能谱对结果进行了表征。用分光光度计和椭圆偏振光谱仪(SE)分析了其光学性质。激光退火热处理有效地促进了氯的扩散,改善了CdTe薄膜器件的光学和形态特性。
CdTe-based thin film solar cells currently represent one of the fastest growing PV technologies, with a superior combination of efficiency, energy payback time and lifecycle environmental impact. However, the current post-deposition annealing treatment is still an energy intensive step of the manufacturing process. A novel method is presented for annealing of CdTe using a high-power diode laser (35 W, 808 nm) for thermal post-processing, combined with holographic optical elements (HOE's) for laser beam heat flow control. The advantage of a laser for annealing lies in its ability to selectively heat only the surface of the CdTe solar cell; improving energy efficiency, process speed and energy resilience. Heat transfer simulations were used to predict the effects of different laser irradiance profiles on the annealing process thermal cycle influence the experimental design and predict optimal laser irradiance profiles. Variations in power and process speed on as-deposited and MgCl2-treated close-space sublimated (CSS) CdTe samples have been performed. The results were characterised using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Optical properties were analysed with a spectrophotometer and ellipsometric spectroscopy (SE). The laser annealing treatment was found to be effective in promoting Chlorine diffusion and improving the optical and morphological properties of CdTe thin film devices.
DOI: 10.1109/pvsc-vol2.2012.6656778
发表时间: 2012-06
期刊: 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2
影响因子: --
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DOI: 10.1179/1743284711y.0000000050
发表时间: 2012
影响因子: 1.8
作者:
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DOI: 10.1109/pvsc.2016.7750165
发表时间: 2016
期刊: --
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作者:
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使用 808 nm 二极管激光器激光退火的 CdTe 薄膜的微观结构、应力和光学性能:激光扫描速度的影响
DOI: 10.3938/jkps.63.229
发表时间: 2013
影响因子: 0.6
作者:
N. Kim;C. Park;Hyun
通讯作者: Hyun
CdTe 和 CdSn3Te4 薄膜的能带结构和光学特性
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
T. Venkatachalam;S. Velumani;S. Ganesan;K. Sakthivel
通讯作者: K. Sakthivel