Enhancing the photoelectric performance of the self-powered all vapor-deposited CsPbCl3 ultraviolet photodetectors by a novel cadmium-doping strategy and heterojunction engineering

Hou, Ze‐Liang; Liu, Xingyue; Wen, Guojun; Jiang, Shulan

doi:10.1016/j.solmat.2022.112175

Cited by 9 publications

(2 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The defects not only hinder the optical properties of perovskite NCs, as stated by Ma et al, they also play a vital role in triggering phase transitions at higher temperatures . General passivation strategies like doping, , heterostructure, ligand exchange, halide exchange, and core–shell formation have been carried out to achieve higher stability and performance. Few surface functional materials such as thiocyanate salt, aromatic carboxylic acid, metal halides, , ionic liquids, and organic compounds are researched upon to fill the vacancies and reduce the NRR via post-synthetic procedures.…”

Section: Introductionmentioning

confidence: 99%

Dual Vacancy Passivation in CsPbCl₃ Perovskite Nanocrystals: Implications on Optoelectronic Applications

Siddharthan

Thapa

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Despite numerous advantages over the traditional light absorbing materials, colloidal cesium lead halide (CsPbX 3 , X = Cl, Br, or I) perovskite nanocrystals (NCs) suffer from enormous defect density, leading to shorter lifetime of charge carriers and material instability. A large number of positively and negatively charged ionic defects are inevitably formed from crystallization via high temperature. Herein, we have studied a simple post-synthesis defect passivation of blue emitting CsPbCl 3 NCs using monovalent metal ion LiCl as a dual-passivating agent. The observed effect (on optical properties) went up by leaps and bounds. Photoluminescence (PL) quantum yield increases from 2.8 to 47.6%, while PL life time increases from 0.56 to 20.79 ns. Various other chloride salts (CaCl 2 , NH 2 Cl, KCl, and NaCl) and Li salts (LiBr and LiI) with different cation and anion combinations, respectively, did not give this effect. All these together with the enhanced overall stability of NCs suggest the synergistic effect of dual passivation and deep defect passivation that leads to significant suppression of non-radiative recombination. An X-ray photoelectron spectroscopy study also reveals that this simple strategy promotes simultaneous passivation of both defects (vacancies) formed from negatively (chlorine) and positively charged ions (lead) of CsPbCl 3. Theoretical study and experimental analysis in this work, together delivers a perceptive understanding of cationic and anionic vacancy healing by LiCl in CsPbCl 3 NCs, thus enhancing its utilization as efficient blue light emitters.

show abstract

Section: Introductionmentioning

confidence: 99%

Dual Vacancy Passivation in CsPbCl₃ Perovskite Nanocrystals: Implications on Optoelectronic Applications

Siddharthan

Thapa

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…[33][34][35][36][37] Inspired by the defect passivation attempts on other types of perovskite semiconductors, our group had employed [BMMIm]Cl ionic liquid modification and Cd-doping strategies to reduce the surface Cl vacancy defects and bulk defects of the CsPbCl 3 polycrystalline films for their use in self-powered UV detectors. 38,39 But the comprehensive performance of these devices was still far behind those of other perovskite-based photodetectors. Seeking more efficient passivators is of great significance for the construction of excellent self-powered CsPbCl 3 UV photodetectors.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast self-powered CsPbCl₃ultraviolet photodetectors with choline chloride for surface passivation and charge transport regulation

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Surface Engineering and Nb₂CT_x‐Modulated CsPbCl₃ Perovskite for Self‐Powered UV Photodetectors with Ultrahigh Responsivity

Luo,

Wang,

Mao

et al. 2024

Advanced Optical Materials

View full text Add to dashboard Cite

All‐inorganic CsPbCl3 perovskite has emerged as a promising material for ultraviolet (UV) photodetection, attributed to its appropriate bandgap and exceptional optoelectronic properties. However, the suboptimal film‐forming quality of the solution process, as well as the instability of films induced by UV radiation and the annealing process, have limited its popularization and application. Herein, the buried layer is pretreated with N, N‐dimethylacetamide (DMF) to improve surface hydrophilicity and facilitate the anchoring of Pb2+. Additionally, Nb2CTx is incorporated into the PbCl2 precursor solution to enhance the quality of CsPbCl3 films. Following surface engineering and Nb2CTx modification (CsPbCl3@Nb2CTx), the morphology and optoelectronic properties of CsPbCl3 films are optimized. Furthermore, the effect of lattice strain and defect state‐induced interface state on the nonradiative charge recombination is mitigated. Ultimately, the UV photodetector fabricated on fluorine‐doped tin oxide (FTO)/SnO2/CsPbCl3@Nb2CTx/Au architecture exhibits outstanding performance including remarkably high responsivity (up to 990 mA W−1), significant specific detectivity (1.03 × 1011 cm Hz1/2 W−1), and rapid rise/decay time (0.24/0.32 µs) under self‐powered mode, with markedly improved stability as well. This approach presents a novel strategy for optimizing CsPbCl3 films through MXene modulation as an immense potential absorb layer for UV photodetector.

show abstract

Enhancing the photoelectric performance of the self-powered all vapor-deposited CsPbCl3 ultraviolet photodetectors by a novel cadmium-doping strategy and heterojunction engineering

Cited by 9 publications

References 60 publications

Dual Vacancy Passivation in CsPbCl₃ Perovskite Nanocrystals: Implications on Optoelectronic Applications

Dual Vacancy Passivation in CsPbCl₃ Perovskite Nanocrystals: Implications on Optoelectronic Applications

Ultrafast self-powered CsPbCl₃ultraviolet photodetectors with choline chloride for surface passivation and charge transport regulation

Surface Engineering and Nb₂CT_x‐Modulated CsPbCl₃ Perovskite for Self‐Powered UV Photodetectors with Ultrahigh Responsivity

Contact Info

Product

Resources

About

Enhancing the photoelectric performance of the self-powered all vapor-deposited CsPbCl3 ultraviolet photodetectors by a novel cadmium-doping strategy and heterojunction engineering

Cited by 9 publications

References 60 publications

Dual Vacancy Passivation in CsPbCl3 Perovskite Nanocrystals: Implications on Optoelectronic Applications

Dual Vacancy Passivation in CsPbCl3 Perovskite Nanocrystals: Implications on Optoelectronic Applications

Ultrafast self-powered CsPbCl3ultraviolet photodetectors with choline chloride for surface passivation and charge transport regulation

Surface Engineering and Nb2CTx‐Modulated CsPbCl3 Perovskite for Self‐Powered UV Photodetectors with Ultrahigh Responsivity

Contact Info

Product

Resources

About

Dual Vacancy Passivation in CsPbCl₃ Perovskite Nanocrystals: Implications on Optoelectronic Applications

Dual Vacancy Passivation in CsPbCl₃ Perovskite Nanocrystals: Implications on Optoelectronic Applications

Ultrafast self-powered CsPbCl₃ultraviolet photodetectors with choline chloride for surface passivation and charge transport regulation

Surface Engineering and Nb₂CT_x‐Modulated CsPbCl₃ Perovskite for Self‐Powered UV Photodetectors with Ultrahigh Responsivity