Next-generation quantum dot solar cells: advances in materials, device engineering and performance optimization
Abstract
Quantum dot solar cells (QDSCs) have emerged as promising next-generation photovoltaic technologies owing to their tunable bandgaps, strong light absorption, solution-processability and potential to surpass the Shockley-Queisser efficiency limit through multiple exciton generation (MEG). This review presents a comprehensive and critically structured overview of recent advances in QDSCs by integrating material development, device engineering, interface optimization, and stability enhancement strategies within a unified framework. Unlike previous reviews that primarily focus on individual material systems or device architectures, this work systematically correlates quantum dot absorber materials, electron and hole transport layers, electrode engineering, fabrication methodologies, and charge-transfer mechanisms with photovoltaic performance metrics. Emphasis is placed on the comparative analysis of PbS, CdSe, perovskite, graphene and environmentally benign quantum dots, highlighting their influence on efficiency, charge transport, stability, and scalability. In addition, recent developments in interface engineering, ligand exchange, surface passivation, core-shell structures, plasmonic enhancement, and hybrid architectures are critically discussed as key routes for suppressing recombination losses and improving long-term operational stability. Emerging trends including AI-assisted device optimization, tandem configurations, and environmentally sustainable QD materials are…
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