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Open research questions in Chalcogenide Semiconductor Thin Films

77 gap statements mined from Chalcogenide Semiconductor Thin Films papers in our 4.5M-paper local library, which holds 1,308 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Future research could investigate the use of different inhibitors to reduce the reaction rate. Future research could analyze the properties of CdS thin films produced using different methods.

    An inhibitory effect on CdS thin films produced by the electrodeposition method · 2026 · DOI

  • The study aims to address this gap by analyzing the structural, optical, and morphological properties of the films.

    An inhibitory effect on CdS thin films produced by the electrodeposition method · 2026 · DOI

  • The influence of sulfur content on the properties of ZnIn2Se4 has not been extensively studied. The effects of sulfur doping on the optical and electrical properties of ZnIn2Se4 are not well understood.

    Influence of Sulfur on Photovoltaic Properties of n-In2S3/p-ZnIn2Se4/FTO Heterojunction Solar Cells · 2026 · DOI

  • The preparation of high-quality stoichiometric films is a crucial problem. There is a lack of understanding of the electrical properties of CdTe thin films grown by Flash Evaporation technique.

    Electrical Characterisation of CdTe Thin Films · 2026 · DOI

  • The scalability of the sol-gel dip-coating process should be explored. The use of environmentally friendly buffer layers should be investigated. The cost-effectiveness of the Cu2CoSnS4 absorber layer should be analyzed.

    Synthesis, analysis and characterization of Cu2CoSnS4 absorber material deposited by simple and low-cost dip-coating technique for solar cells applications · 2026 · DOI

  • The lack of a suitable annealing strategy for Sb2S3 thin films. The need for a dual-action mechanism that suppresses high-temperature volatilization and guides oxygen atoms to fill sulfur vacancies.

    Ambient Confined-Space Annealing for Crystallization Enhancement and Defect Passivation in Sb2S3 Thin-Film Solar Cells · 2026 · DOI

  • The trade-off between high-temperature annealing and defect introduction has not been fully addressed. The lack of a suitable annealing strategy for Sb2S3 thin films has limited their potential for high-efficiency solar cells.

    Ambient Confined-Space Annealing for Crystallization Enhancement and Defect Passivation in Sb2S3 Thin-Film Solar Cells · 2026 · DOI

  • The need for a review of the main physical and chemical methods for synthesizing substitutional cadmium sulfide-selenide solid solution films. The lack of understanding of the phase diagram of the CdS-CdSe system and the regions of existence of different phases.

    SYNTHESIS OF CADMIUM SULPHIDE-SELENIDE SOLID SOLUTION FILMS. REVIEW · 2026 · DOI

  • The limited solubility of elemental sulfur in ethylene glycol. The need to control the electrolysis conditions to obtain high-quality cathodic deposits.

    EFFECT OF DEPOSITION CONDITIONS ON THE COMPOSITION OF CdS THIN FILMS FROM A NON-AQUEOUS ETHYLENE GLYCOL ELECTROLYTE · 2026 · DOI

  • The paper investigates the co-deposition of cadmium with elemental sulfur, which is a relatively unexplored area.

    EFFECT OF DEPOSITION CONDITIONS ON THE COMPOSITION OF CdS THIN FILMS FROM A NON-AQUEOUS ETHYLENE GLYCOL ELECTROLYTE · 2026 · DOI

  • The need for optimization of CdTe-based solar cells. The lack of a viable method for creating high-performance CdTe solar cells.

    Predictive Modelling and Optimization of CdTeBased Solar Cells Using SCAPS-1D and ML Models · 2026 · DOI

  • Future research should investigate the effect of different solvent mixtures on the performance of the devices. Future research should focus on improving the film quality of the solution-processed active layer to increase charge collection efficiency and fill factors.

    Investigation of charge recombination losses and charge collection efficiency in DPP-DTT:PC70BM based BHJ solar cell from impedance spectroscopy · 2026 · DOI

  • The study highlights the need for further research into the role of charge carrier dynamics on the performance of BHJ solar cells.

    Investigation of charge recombination losses and charge collection efficiency in DPP-DTT:PC70BM based BHJ solar cell from impedance spectroscopy · 2026 · DOI

  • The synthesis of CdO thin films with optimal properties is a challenge. The understanding of the effect of precursor molarity on the properties of CdO thin films is limited. The optimization of nanostructure and optical properties of CdO thin films for specific applications is a challenge.

    Optimizing nanostructure and optical properties of CdO thin films via molarity-controlled SILAR deposition · 2026 · DOI

  • Future studies can investigate the effect of other synthesis parameters on the properties of CdO thin films. The development of CdO-based devices with enhanced properties can be explored. The application of CdO thin films in various fields such as solar energy harvesting, optoelectronic integration, and photovoltaics can be investigated.

    Optimizing nanostructure and optical properties of CdO thin films via molarity-controlled SILAR deposition · 2026 · DOI

  • Future work should focus on fabricating and experimentally characterizing complete perovskite solar cell devices incorporating the thiourea-derived CdS ETL, optimizing film thickness and deposition parameters, and evaluating long-term device stability under ambient conditions.

    Thiourea-based CdS thin films: structural and optical analysis for photovoltaic applications · 2026 · DOI

  • To the best of our knowledge, reaction-rate control using Na 2 SO 3 has not been investigated in electrodeposited CdTe films.

    The effect of reaction rate on CdTe films produced by electrodeposition method · 2026 · DOI

  • While antimony selenide (Sb 2 Se 3) has emerged as a promising absorber for photoelectrochemical water splitting, the critical role of the hole transport layer (HTL) for back-contact remains underexplored.

    Beyond Hole Transportation: Substrate-Engineered Sb 2 Se 3 Photocathodes · 2026 · DOI

  • Recombination losses and carrier concentration limit the overall optical and electrical behavior of the CdTe layer.

    Influences of chemical and cadmium telluride thin film solar cell interfaced with titanium oxynitride bi-layer: characteristics study · 2026 · DOI

  • In the case of the Sb2(S, Se)3 solar cell featuring a superstrate structure of indium tin oxide/cadmium sulfide (CdS)/Sb2(S, Se)3/spiro-OMeTAD/Au, the device performance was limited by the poor heterojunction interfaces, especially the poor interface of the P-N heterojunction.

    InCl3-modified In2O3/CdS double electron transport layers for high-performance Sb2(S, Se)3 solar cell · 2025 · DOI

  • The relatively low majority carrier concentration of Kesterite Cu2ZnSn(S,Se)4 solar cells. Detrimental band tailing induced by bulk Cu–Zn disorder defects. Severe interface recombination limiting device efficiency.

    14.2% Efficient Kesterite Solar Cells From Dimethyl Sulfoxide Solution via Li + Cd Co‐Doping · 2026 · DOI

  • Further study of the properties of CdSe 1-x S x thin films. Investigation of the potential applications of chemical bath deposition for synthesizing substitutional cadmium sulfide-selenide solid solution films.

    SYNTHESIS OF CADMIUM SULPHIDE-SELENIDE SOLID SOLUTION FILMS. REVIEW · 2026 · DOI

  • The development of new semiconductor materials with improved efficiency and stability. The investigation of selenium-based semiconductor systems and thin-film photovoltaic technologies. The study of the challenges and limitations of advanced semiconductor materials for renewable energy technologies.

    Advanced Semiconductor Materials for Renewable Energy Technologies · 2026 · DOI

  • Further operational reliability testing could be conducted, - Storage in an N 2 desiccator for 231 days, - No encapsulated thermal cycling and damp-heat…

    Early-stage local chemistry regulation enabling open-circuit voltage of 847 mV in wide-bandgap Cu2ZnSnS4 solar cells · 2026 · DOI

  • Evaluating device stability under practical conditions, - Conducting encapsulated thermal cycling and damp-heat testing, - Advancing complex multinary compound…

    Early-stage local chemistry regulation enabling open-circuit voltage of 847 mV in wide-bandgap Cu2ZnSnS4 solar cells · 2026 · DOI

Most-cited papers in Chalcogenide Semiconductor Thin Films

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Open questions raised by papers listed on this page include: (1) Future research could investigate the use of different inhibitors to reduce the reaction rate (“An inhibitory effect on CdS thin films produced by the electrodeposition method”, 2026); (2) The effects of sulfur doping on the optical and electrical properties of ZnIn2Se4 are not well understood (“Influence of Sulfur on Photovoltaic Properties of n-In2S3/p-ZnIn2Se4/FTO…”, 2026); (3) There is a lack of understanding of the electrical properties of CdTe thin films grown by Flash Evaporation technique (“Electrical Characterisation of CdTe Thin Films”, 2026); (4) The lack of a suitable annealing strategy for Sb2S3 thin films (“Ambient Confined-Space Annealing for Crystallization Enhancement and Defect…”, 2026); (5) The lack of understanding of the phase diagram of the CdS-CdSe system and the regions of existence of different phases (“SYNTHESIS OF CADMIUM SULPHIDE-SELENIDE SOLID SOLUTION FILMS. REVIEW”, 2026). 77 gap statements have been mined from Chalcogenide Semiconductor Thin Films papers in our 4.5M-paper local library, which holds 1,308 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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