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TiO2/nanoporous silicon hybrid contact for heterojunction crystalline solar cell

机译：TiO2 /纳米孔硅混合接触杂交结晶太阳能电池

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摘要

The conventional solar cell architectures include a p-n junction of c-Si sandwiched by rear and front contacts. The conventional approach features a complex as well as expensive procedure. Here, we propose a new architecture for p-n heterojunction solar cells prepared by a simple and cost-effective procedure. In this regard, (1) a silicon wafer underwent surface treatment through electrochemical anodization. To prepare a stick junction, (2) photoactive TiO2 nanoparticles were deposited over the porous layer by electrophoretic technique. Finally, (3) indium tin oxide (ITO) was sputtered. During the fabrication steps, we examined various anodization times ranging from 6 to 12 min to study the electrical behavior of the proposed device. Current-voltage measurements revealed higher performance for the 6 min sample, with a short circuit current density and open circuit voltage of 29.632 mA cm(-2) and 0.5 V, respectively. Also, morphology study showed uneven surface over the fabricated sample. Measurement of the optical properties showed potential anti-reflection surfaces. However, the 6 min sample, with an average reflectance of 1.9%, proved to be the competitive one. In addition, absorption data revealed a band gap of 1.38 eV for the 6 min sample, which is broader than that of others. Also, PL measurements explain the effective charge transfer for the lowest duration of anodization.
机译：传统的太阳能电池架构包括由后部和前触点夹在一起的C-Si的P-N结。传统方法具有复杂的和昂贵的过程。在这里，我们提出了一种通过简单且经济有效的程序制备的P-N异质结太阳能电池的新架构。在这方面，（1）通过电化学阳极氧化进行表面处理的硅晶片。为了制备棒结，通过电泳技术将光​​活性TiO2纳米颗粒沉积在多孔层上。最后，溅射（3）氧化铟锡（ITO）。在制造步骤期间，我们检查了从6到12分钟的各种阳极氧化次数，以研究所提出的装置的电动行为。电流电压测量显示6分钟样品的性能更高，短路电流密度和29.632mA（-2）和0.5V的开路电压。此外，形态学研究在制造的样品上显示了不平坦的表面。光学性质的测量显示出潜在的抗反射表面。然而，6分钟样品，平均反射率为1.9％，被证明是竞争力。此外，吸收数据显示6分钟样品的1.38eV的带隙，比其他样品更宽。此外，PL测量解释了用于阳极氧化持续时间的有效电荷转移。

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