Development of a Hybrid Classical-Quantum SVM Model for Predicting Perovskite Formation Energy
DOI:
https://doi.org/10.30871/jaic.v10i2.12240Keywords:
Formation Energy, Explainable AI, Hybrid SVM, Perovskite, Quantum Machine LearningAbstract
The global energy crisis and the threat of climate change are driving the acceleration of the transition towards new and renewable energy (NRE), with perovskite solar cells emerging as a leading candidate due to their high efficiency (>25%) and low production costs. A major challenge in the development of perovskite materials is their structural stability, which can be assessed through Formation Energy (FE). However, FE calculations using Density Functional Theory (DFT) are computationally expensive and not scalable for screening thousands of material candidates. This research develops a Quantum Machine Learning (QML) model to predict the Formation Energy of ABX₃ perovskite materials as an efficient alternative to conventional DFT approaches. Three variants of Support Vector Machine algorithms are compared comprehensively: the classical SVM with an RBF kernel as a baseline, Quantum SVM (QSVM) utilizing a quantum kernel with ZZFeatureMap to represent data in a high-dimensional quantum feature space, and Hybrid SVM (HSVM), which combines the expressiveness of the quantum feature map with the flexibility of classical parameter optimization. Evaluation results show that Hybrid SVM outperforms others with R² = 0.7221, RMSE = 0.4203, and MAE = 0.3228 on test data, improving by 4-8% compared to classical SVM (R² = 0.6674) and surpassing QSVM (R² = 0.6966). Interpretability analysis using Explainable AI with permutation feature importance reveals that the bandgap (HSE gap indirect) and effective hole mass are the most crucial predictors, confirming that electronic properties dominate the thermodynamic stability of perovskites. This study validates the potential of QML, particularly the hybrid approach, as an intelligent solution to accelerate the screening and design of renewable energy materials, supporting Indonesia's target of a 23% energy mix by 2025 and the Vision of Indonesia 2045.
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