Nucleophilic Covalent Ligands Enable Simultaneous Surface Reconstruction and Passivation of Colloidal InSb Quantum Dots for Stable Short‐wave Infrared Photodetectors DOI Creative Commons
Yangning Zhang, Muhammad Imran, Pan Xia

и другие.

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Indium antimonide (InSb) colloidal quantum dots (CQDs) are promising candidates for short-wave infrared (SWIR) photodetectors due to their large Bohr exciton radius and tunable bandgap in the 0.6-1.3 eV range. However, formation of metal oxides on InSb surfaces during synthesis impedes charge transport, necessitating CQD resurfacing strategies integration into photodetectors. Previous reports achieved progress device efficiency by these CQDs with acid-halide sequential treatments, but operating stability remains unsatisfactory. Herein, we report a solution-phase strategy surface reconstruction passivation using sulfur-based nucleophilic covalent ligands. We find that short-chain thiol molecules remove through attack enable robust In Sb via strong bonds, whereas sulfides less effective at oxide removal passivation. Consequently, thiolate-passivated exhibit tenfold decrease trap state density compared controls remain structurally optically stable 5 months. demonstrate SWIR realize high external (EQE) 28% 1450 nm, highest among reported photodetectors, retaining 95% performance following 300 h biased illuminated operation.

Язык: Английский

Sequential Surface Tailoring from Colloid to Solid in Ag2Te Colloidal Quantum Dots Enables High Hole Mobility and Efficient Shortwave Infrared Photodetection DOI
Abhishek Sharma,

Doheon Yoo,

Ha‐Neul Kim

и другие.

Nano Energy, Год журнала: 2025, Номер 141, С. 111091 - 111091

Опубликована: Апрель 28, 2025

Язык: Английский

Процитировано

0
Nucleophilic Covalent Ligands Enable Simultaneous Surface Reconstruction and Passivation of Colloidal InSb Quantum Dots for Stable Short‐wave Infrared Photodetectors DOI Creative Commons
Yangning Zhang, Muhammad Imran, Pan Xia

и другие.

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Indium antimonide (InSb) colloidal quantum dots (CQDs) are promising candidates for short-wave infrared (SWIR) photodetectors due to their large Bohr exciton radius and tunable bandgap in the 0.6-1.3 eV range. However, formation of metal oxides on InSb surfaces during synthesis impedes charge transport, necessitating CQD resurfacing strategies integration into photodetectors. Previous reports achieved progress device efficiency by these CQDs with acid-halide sequential treatments, but operating stability remains unsatisfactory. Herein, we report a solution-phase strategy surface reconstruction passivation using sulfur-based nucleophilic covalent ligands. We find that short-chain thiol molecules remove through attack enable robust In Sb via strong bonds, whereas sulfides less effective at oxide removal passivation. Consequently, thiolate-passivated exhibit tenfold decrease trap state density compared controls remain structurally optically stable 5 months. demonstrate SWIR realize high external (EQE) 28% 1450 nm, highest among reported photodetectors, retaining 95% performance following 300 h biased illuminated operation.

Язык: Английский

Процитировано

0