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首页> 外文期刊>International Journal of Photoenergy >Development of Thin Film Amorphous Silicon Tandem Junction Based Photocathodes Providing High Open-Circuit Voltages for Hydrogen Production
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Development of Thin Film Amorphous Silicon Tandem Junction Based Photocathodes Providing High Open-Circuit Voltages for Hydrogen Production

机译：薄膜非晶硅串联结的光电阴极的开发提供高开路电压用于制氢

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摘要

Hydrogenated amorphous silicon thin film tandem solar cells (a-Si: H/a-Si: H) have been developed with focus on high open-circuit voltages for the direct application as photocathodes in photoelectrochemical water splitting devices. By temperature variation during deposition of the intrinsic a-Si: H absorber layers the band gap energy of a-Si: H absorber layers, correlating with the hydrogen content of the material, can be adjusted and combined in a way that a-Si: H/a-Si: H tandem solar cells provide open-circuit voltages up to 1.87V. The applicability of the tandem solar cells as photocathodes was investigated in a photoelectrochemical cell (PEC) measurement set-up. With platinum as a catalyst, the a-Si: H/a-Si: H based photocathodes exhibit a high photocurrent onset potential of 1.76V versus the reversible hydrogen electrode (RHE) and a photocurrent of 5.3mA/cm(2) at 0V versus RHE (under halogen lamp illumination). Our results provide evidence that a direct application of thin film silicon based photocathodes fulfills the main thermodynamic requirements to generate hydrogen. Furthermore, the presented approach may provide an efficient and low-cost route to solar hydrogen production.
机译：已经开发了氢化非晶硅薄膜串联太阳能电池（a-Si：H / a-Si：H），重点是高开路电压，可直接用作光电化学水分解装置中的光阴极。通过本征a-Si：H吸收层沉积过程中的温度变化，可以调整和组合与材料的氢含量相关的a-Si：H吸收层的带隙能，从而使a-Si： H / a-Si：H串联太阳能电池提供高达1.87V的开路电压。在光电化学电池（PEC）测量装置中研究了串联太阳能电池作为光阴极的适用性。使用铂作为催化剂，基于a-Si：H / a-Si：H的光电阴极相对于可逆氢电极（RHE）表现出1.76V的高光电流起始电势，在0V时的光电流为5.3mA / cm（2）与RHE（在卤素灯照明下）相比。我们的结果提供了证据，证明直接应用薄膜硅基光电阴极可以满足产生氢的主要热力学要求。此外，提出的方法可以提供生产太阳能氢的有效且低成本的途径。

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