Prediction of power conversion efficiency of phenothiazine-based dye-sensitized solar cells using Monte Carlo method with index of ideality of correlation

Simplified molecular-input line-entry system (SMILES) notation and inbuilt Monte Carlo algorithm of CORAL software were employed to construct generative and prediction QSPR models for the analysis of the power conversion efficiency (PCE) of 215 phenothiazine derivatives. The dataset was divided into four splits and each split was further divided into four sets. A hybrid descriptor, a combination of SMILES and hydrogen suppressed graph (HSG), was employed to build reliable and robust QSPR models. The role of the index of ideality of correlation (IIC) was also studied in depth. We performed a comparative study to predict PCE using two target functions (TF1 without IIC and TF2 with IIC). Eight QSPR models were developed and the models developed with TF2 was shown robust and reliable. The QSPR model generated from split 4 was considered a leading model. The different statistical benchmarks were computed for the lead model and these were r(training set)(2) = 0:7784; r(invisible training set)(2) = 0:7955; r(calibration set)(2) = 0:7738; r(validation set)(2) = 0:7506; Q(training set)(2) = 0:7691; Q(invisible training set)(2) = 0:7850; Q(calibration set)(2) = 0:7501; Q(validation set)(2) = 0:7085; IICtraining set = 0.8590; IICinvisible training set = 0.8297; IICcalibration set = 0.8796; IICvalidation set = 0.8293, etc. The promoters of increase and decrease of endpoint PCE were also extracted.

Automated summary

The study utilized SMILES notation and the Monte Carlo algorithm of CORAL software to construct QSPR models for analyzing the power conversion efficiency of phenothiazine derivatives. A hybrid descriptor and the index of ideality of correlation were employed to build reliable and robust models, with the QSPR model from split 4 being considered as the leading model. Various statistical benchmarks were computed for the lead model, showing its robustness and reliability.