Samaki Soulye, Tchangnwa Nya Fridolin, Dzifack Kenfack Guy Maurel, Laref Amel
Materials Science Laboratory, Department of Physics, Faculty of Science, University of Maroua, P.O. Box 814, Maroua, Cameroon.
Department of Physics and Astronomy, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia.
Sci Rep. 2023 Sep 19;13(1):15517. doi: 10.1038/s41598-023-42471-w.
In this research work, we investigated the effects of a broad set of materials properties and external operating parameters on the opto-electrical output of a hybrid RbGeI-based perovskite solar cell (PSC) as a means of enhancing its performance. We first performed a judicious numerical modelling of the reference cell with the following structure FTO/TiO/RbGeI/Spiro-OMeTAD/Ag, with data retrieved from the experiment. SCAPS program enables to model the device, considering charge carriers transport governing equations. Investigations are directed on addressing the current challenges that include thinner, less environmentally harmful, cost-effectiveness, and more stable solar devices over time. Analysis of the effects of different hole transport material (HTM) on current-voltage (J-V) and external quantum efficiency (QE) characteristics, helps to identify CuI as an ideal HTM. Optimal cell output were achieved by investigating the effects of metal contact work function, defect states, RbGeI thickness, light transmission/reflection at the front/back contact, as well as operating temperature. As a result, efficiency increased significantly from 10.11 to 18.10%, and fill factor that represents a stability indicator, increased from 63.68 to 76.95%. Moreover, an optimum open-circuit voltage Voc = 0.70 V and a high short-circuit current density of Jsc = 33.51 mA/cm were recorded. An additional study on the capture cross-section of charge carriers ([Formula: see text]) on PV characteristics, enabled to achieve a power conversion efficiency (PCE) of 29.71% and FF of 88% at a value of [Formula: see text] selected to be 10 cm. This contribution aims at designing and producing thinner, more efficient, more stable and more environmentally clean and economically viable PSCs.
在本研究工作中，我们研究了一系列广泛的材料特性和外部操作参数对基于RbGeI的混合钙钛矿太阳能电池（PSC）光电输出的影响，以此作为提高其性能的一种手段。我们首先对具有FTO/TiO/RbGeI/Spiro-OMeTAD/Ag结构的参考电池进行了审慎的数值建模，数据取自实验。SCAPS程序能够考虑电荷载流子传输控制方程对器件进行建模。研究旨在应对当前的挑战，包括更薄、对环境危害更小、成本效益更高以及随着时间推移更稳定的太阳能器件。分析不同空穴传输材料（HTM）对电流-电压（J-V）和外量子效率（QE）特性的影响，有助于确定CuI为理想的HTM。通过研究金属接触功函数、缺陷态、RbGeI厚度、前后接触处的光透射/反射以及工作温度的影响，实现了最佳的电池输出。结果，效率从10.11%显著提高到18.10%，代表稳定性指标的填充因子从63.68%提高到76.95%。此外，记录到最佳开路电压Voc = 0.70 V和高短路电流密度Jsc = 33.51 mA/cm²。对电荷载流子俘获截面（[公式：见原文]）对光伏特性影响的进一步研究，在选定[公式：见原文]值为10 cm时，实现了29.71%的功率转换效率（PCE）和88%的填充因子。本研究旨在设计和生产更薄、更高效、更稳定、更环保且经济可行的PSC。
