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Mechanistic insights into charge transfer engineering in CdSe-based quantum dot-sensitized solar cells

Hamza Farhan Abu OwidaMedical Engineering Department, Faculty of Engineering, Al-Ahliyya Amman University, Amman, 19328, JordanAsokan VasudevanFaculty of Business and Communications, INTI International University, 71800, Negeri Sembilan, MalaysiaSuleiman MohammadDepartment of Business Administration, Business School, Al al-bayt University, Mafraq, 25113, JordanH. R. ManjunathSatya Sundar Gajendra MohapatraDepartment of Radio-Diagnosis, IMS and SUM Hospital, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, 751003, IndiaVishal GuptaDepartment of Radiology, Sharda University, Knowledge Park III, Greater Noida, IndiaSanjeev KumarDepartment of Physics, University Institute of Sciences, Chandigarh University, Mohali, Punjab, IndiaHusanov SaidbekDepartment of Basic Medical Sciences, Termez University of Economics and Service, Termez, UzbekistanFotima AxmedovaUrgench Ranch Technology University, Department of clinical science, Urgench, UzbekistanMohsen TaherianYoung Researchers and Elite Club, Tehran Branch, Islamic Azad University, Tehran, Iran

2026en

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Annotatsiya

Charge transfer fundamentally determines the photovoltaic efficiency of CdSe-based quantum dot-sensitized solar cells by governing exciton dissociation, carrier transport, interfacial electron injection, and charge recombination. This review develops a mechanism-oriented perspective that correlates the structural, electronic, and interfacial characteristics of CdSe QDs with the charge-transfer processes underlying device operation. The influence of quantum confinement, surface chemistry, defect states, and energy-level alignment is systematically analyzed to establish the intrinsic relationships between material properties and carrier dynamics. Recent advances in interfacial engineering, ligand regulation, heterostructure design, and electronic-state modulation are examined through their mechanistic roles in controlling charge separation, transport kinetics, and recombination pathways rather than solely their impact on photovoltaic performance. Emerging characterization techniques, multiscale theoretical approaches, and data-driven design strategies are further discussed for their potential to enable predictive optimization of charge-transfer behavior. By integrating fundamental charge-transfer physics with rational engineering principles, a unified conceptual framework is presented to guide the rational design of highly efficient, stable, and scalable CdSe-based QD-sensitized solar cells and to identify promising directions for future photovoltaic materials and device development.

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DOI: 10.1016/j.chphi.2026.101165

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