Variable Valence Ce‐Based Cs2CeAgBr6 Perovskite Nanocrystals for Highly Selective Photoconversion of CO2 to CH4 DOI Open Access

Sai‐Nan Guo,

Yanjun Dong,

Meng Qiao

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Abstract Lead halide perovskites demonstrate outstanding luminescent characteristics. However, the inclusion of lead components restricts their extensive utilization. Halide perovskite materials, formulated as A 2 M(III)M(I)X 6 or M(IV)X , possess potential to serve stable and eco‐friendly substitutes for optoelectronic applications. Nevertheless, wide bandgap (>3 eV) hinders practical implementation across various domains. Here, variable valence Ce‐based Cs₂CeAgBr₆ nanocrystals (NCs) are first synthesized with a 2.65 eV. Intriguingly, coexistence trivalent tetravalent Ce can cause localized spin f‐layer electrons Ce, leading 3+/4+ (the state ranges between III IV) defects. By manipulating source proportions, dual achieves minimal defect content 1.4%. The as‐prepared NCs exhibit exceptional efficiency in CO reduction driven by sunlight, CH 4 selectivity greater than 70% super high charge transfer rate 802.5 µmol·g −1 h far surpassing previously reported findings. Additionally, theoretical calculations have elucidated photocatalytic mechanism involved CO₂ reduction. outcomes this investigation expected stimulate design fabrication novel lead‐free nanocrystals.

Language: Английский

Intrinsic carrier transport and optical properties of lead-free inorganic halide double perovskites from first-principles DOI
Safdar Iqbal, Xinlei Duan, Jianwu Wang

et al.

Materials Science in Semiconductor Processing, Journal Year: 2025, Volume and Issue: 188, P. 109264 - 109264

Published: Jan. 6, 2025

Language: Английский

Citations

0
Performance enhancement of BHJ CH3NH3PbI3: PC61BM photodetectors by surface plasmon effect DOI

Meijiao Wang,

Dayong Jiang, Man Zhao

et al.

Journal of Materials Science Materials in Electronics, Journal Year: 2025, Volume and Issue: 36(3)

Published: Jan. 1, 2025

Language: Английский

Citations

0
Formamidinium In Situ Assistance for Buried Interfaces in Perovskite Solar Cells DOI
Dongliang Bai, Haoxu Wang,

Shaoan Yang

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 13, 2025

Abstract Defects at the buried interface and interfacial energy misalignment are critical challenges in perovskite solar cells (PSCs), causing severe carrier nonradiative recombination introducing degradation centers that limit device performance. In particular, issues such as void formation, poor adhesion, defects compromise both efficiency durability of PSCs. To address these challenges, a formamidinium‐based situ coordination (F‐ISS) strategy is proposed to optimize normal‐structure By incorporating various materials (FAI, FABr, FACl), F‐ISS approach effectively reduces defects, mitigates nanoparticle aggregation, enhances electrical morphological uniformity electron transport layer (ETL), improves level alignment. The F‐ISS‐incorporation ETL exhibits improved surface smoothness, reduced trap density, stronger leading superior quality interface. These enhancements result performance, with achieving an 25.61%, surpassing control 23.43%. Additionally, PCE mini‐module active area 18.55 cm 2 achieved 21.72%, 19.76%. Moreover, significantly boosts stability, retaining over 80% initial after 1000 h continuous illumination maximum power point testing. findings establish promising solution for addressing inherent photovoltaics.

Language: Английский

Citations

0
Alloy [FA,Cs]PbI3 perovskite surfaces: The role of surface cesium composition in stability and tolerance to defect formation DOI
Ana L. Montero‐Alejo, María José Silva-Portales, Lucas Lodeiro

et al.

Journal of Physics and Chemistry of Solids, Journal Year: 2024, Volume and Issue: 192, P. 112107 - 112107

Published: May 23, 2024

Language: Английский

Citations

2
Pseudohalide Anion Passivation for Aqueous‐Stable Pure Red Perovskite Nanocrystals DOI
Xian Meng, Jie Chen, Yanxiong Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: Aug. 12, 2024

Abstract Recently emerging perovskite nanocrystals (PNCs) have drawn considerable attention due to the superior optoelectronic performances. However, terrible stability of red emissive PNCs (r‐PNCs) limits their broader application in aqueous media. Despite various encapsulation methods are proposed, preparation r‐PNCs with facile operation and excellent durability is still challenging. Herein, green (g‐PNCs) by employing water as an external stimulus treat oleyamine‐capped CsPbBr 3 synthesized initially, then aqueous‐stable pure anion‐exchange reaction subsequently thiocyanate (SCN ‐ ) passivation treatment (SCN‐r‐PNCs) prepared. The obtained SCN‐r‐PNCs display high brightness, outstanding stability, extended photoluminescence lifetime. Moreover, combining portable smartphones, a fluorescence chemosensor for detection SCN − ions constructed, which exhibits simple operation, sensitivity, selectivity, low limit, visualized sensing. This work not only provides new strategy prepare PNCs, but also further extends aqueous‐based fields.

Language: Английский

Citations

0
Evolution of perovskite nanocrystals in hot injection process with various ligand-rich systems DOI
Huazheng Li, Gaoling Zhao, Bin Song

et al.

Journal of Sol-Gel Science and Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 6, 2024

Language: Английский

Citations

0
2D/3D heterojunction carrier dynamics and interface evolution for efficient inverted perovskite solar cells DOI
Yi Chen, Zhu Ma,

Zhuowei Du

et al.

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Language: Английский

Citations

0
Variable Valence Ce‐Based Cs2CeAgBr6 Perovskite Nanocrystals for Highly Selective Photoconversion of CO2 to CH4 DOI Open Access

Sai‐Nan Guo,

Yanjun Dong,

Meng Qiao

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Abstract Lead halide perovskites demonstrate outstanding luminescent characteristics. However, the inclusion of lead components restricts their extensive utilization. Halide perovskite materials, formulated as A 2 M(III)M(I)X 6 or M(IV)X , possess potential to serve stable and eco‐friendly substitutes for optoelectronic applications. Nevertheless, wide bandgap (>3 eV) hinders practical implementation across various domains. Here, variable valence Ce‐based Cs₂CeAgBr₆ nanocrystals (NCs) are first synthesized with a 2.65 eV. Intriguingly, coexistence trivalent tetravalent Ce can cause localized spin f‐layer electrons Ce, leading 3+/4+ (the state ranges between III IV) defects. By manipulating source proportions, dual achieves minimal defect content 1.4%. The as‐prepared NCs exhibit exceptional efficiency in CO reduction driven by sunlight, CH 4 selectivity greater than 70% super high charge transfer rate 802.5 µmol·g −1 h far surpassing previously reported findings. Additionally, theoretical calculations have elucidated photocatalytic mechanism involved CO₂ reduction. outcomes this investigation expected stimulate design fabrication novel lead‐free nanocrystals.

Language: Английский

Citations

0