Curtailing the toxicity level of perovskites is a considerable obstacle resisting the wide-scale commercialization of perovskite solar cells (PSCs). This study investigates the impact of implementing several charge transport layers (CTLs) on the performance of the proposed lead-free Cs2TiCl6/ Cs2AgBiI6 PSC employing SCAPS-1D simulations. Additionally, the effect of variations in thickness, doping, and defect concentrations of each layer has been considered to optimize the performance of the proposed device. Furthermore, various machine learning models have been trained to estimate the performance of the proposed device through a generated dataset consisting of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(2187\)</EquationSource> </InlineEquation> unique data points. Results reveal that employing high quality Cs2TiCl6 layer of <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(100\ nm\)</EquationSource> </InlineEquation> thickness and <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(1\times {10}^{14\ } {cm}^{-3}\)</EquationSource> </InlineEquation> donor doping density, above a <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(1000\ nm\)</EquationSource> </InlineEquation> Cs2AgBiI6 absorber with <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(1\times {10}^{18\ } {cm}^{-3}\)</EquationSource> </InlineEquation> acceptor doping density can theoretically achieve a power conversion efficiency (PCE) of <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(32.72 \%\)</EquationSource> </InlineEquation> and a short circuit current density (JSC) of <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(26.06\ mA/{cm}^{2}\)</EquationSource> </InlineEquation>. Moreover, the extreme gradient boosting (XGB) model has been demonstrated to be the most effective model to predict the performance of the proposed PSC, yielding the lowest root mean square error (<InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(RMSE\)</EquationSource> </InlineEquation>), and the highest coefficient of determination (<InlineEquation ID="IEq9"> <EquationSource Format="TEX">\({R}^{2}\)</EquationSource> </InlineEquation>) among the other examined models. The findings highlight the capability of optimally engineered dual-absorber PSCs to be considered as eco-friendly, competitive alternatives to the conventional lead-based PSCs.

Machine learning prediction of dual absorber lead-free perovskite solar cells for boosting PCE

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2026年5月24日

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Shorok Elewa,
Nihal F. F. Areed,
Bedir Yousif,
Mohy Eldin A. Abo-Elsoud

摘要

Curtailing the toxicity level of perovskites is a considerable obstacle resisting the wide-scale commercialization of perovskite solar cells (PSCs). This study investigates the impact of implementing several charge transport layers (CTLs) on the performance of the proposed lead-free Cs₂TiCl₆/ Cs₂AgBiI₆ PSC employing SCAPS-1D simulations. Additionally, the effect of variations in thickness, doping, and defect concentrations of each layer has been considered to optimize the performance of the proposed device. Furthermore, various machine learning models have been trained to estimate the performance of the proposed device through a generated dataset consisting of \(2187\) unique data points. Results reveal that employing high quality Cs₂TiCl₆ layer of \(100\ nm\) thickness and \(1\times {10}^{14\ } {cm}^{-3}\) donor doping density, above a \(1000\ nm\) Cs₂AgBiI₆ absorber with \(1\times {10}^{18\ } {cm}^{-3}\) acceptor doping density can theoretically achieve a power conversion efficiency (PCE) of \(32.72 \%\) and a short circuit current density (J_SC) of \(26.06\ mA/{cm}^{2}\) . Moreover, the extreme gradient boosting (XGB) model has been demonstrated to be the most effective model to predict the performance of the proposed PSC, yielding the lowest root mean square error ( \(RMSE\) ), and the highest coefficient of determination ( \({R}^{2}\) ) among the other examined models. The findings highlight the capability of optimally engineered dual-absorber PSCs to be considered as eco-friendly, competitive alternatives to the conventional lead-based PSCs.