Laser induced ion migration in all-inorganic mixed halide perovskite micro-platelets

Wang, Ziming; Wang, Yue; Nie, Zhonghui; Ren, Yinjuan; Zeng, Haibo

doi:10.1039/c9na00565j

Cited by 27 publications

(40 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the possible reasons might be the daunting challenge in fabricating high‐quality ILHP heterostructure owing to the complex nucleation factors. [ 19 ] Specifically, since the preparation temperatures of the different halide perovskite are similar, the traditional one‐step chemical vapor deposition (CVD) tends to form the homogeneous alloy perovskite rather than heterostructure. [ 11,19 ] Moreover, as for the two‐step CVD using the binary halide precursors, the typical ion exchange will occur between ILHPs formed in the first stage and the newly introduced halogen atoms, which again gives rise to the perovskite alloys.…”

Section: Figurementioning

confidence: 99%

“…[ 19 ] Specifically, since the preparation temperatures of the different halide perovskite are similar, the traditional one‐step chemical vapor deposition (CVD) tends to form the homogeneous alloy perovskite rather than heterostructure. [ 11,19 ] Moreover, as for the two‐step CVD using the binary halide precursors, the typical ion exchange will occur between ILHPs formed in the first stage and the newly introduced halogen atoms, which again gives rise to the perovskite alloys. [ 20 ] Although several post‐processing methods have been demonstrated to generate non‐uniformity in ILHPs, such as by the electron beam lithography and focused laser irradiation.…”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

Halide Perovskite Lateral Heterostructures for Energy Routing Based Photonic Applications

Ren

Wang

et al. 2020

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

Semiconductor heterostructures hold the promise for developing novel integrated devices with on‐demand photonic and optoelectronic properties. Herein, the perovskite lateral heterostructures in forms of microplates and microwires are fabricated by precise control of two‐step atmospheric pressure chemical vapor deposition course and the unique optical properties are demonstrated for the first time. The comprehensive spectroscopic and elemental mapping characterizations reveal the core‐shell‐like configuration of the individual heterostructure, which features the fascinating energy routing nature. Taking advantage of the effective photon recycling and the energy transfer processes, the record‐low threshold (≈3.5 µJ cm−2) lasing and the indirect pumping induced lasers from the single micro‐heterostructure are demonstrated. Moreover, the distinctive optical waveguides with propagation length independent output spectra from the microwire heterostructure are realized. These findings represent a significant advance in developing novel and functional optoelectronic devices by engineering the perovskite heterostructure.

show abstract

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Halide Perovskite Lateral Heterostructures for Energy Routing Based Photonic Applications

Ren

Wang

et al. 2020

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, mixed‐halide perovskites show electrical‐field‐induced ion migration, which results in phase segregation and reduced PLQE. [ 9 ] Moreover, this halide migration is detrimental to the device stability, particularly in blue PeLEDs, which require a higher working voltage and hence a stronger electric field for operation. Therefore, a significantly more stable perovskite system is required for blue PeLEDs.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Perovskite‐Based Blue Light‐Emitting Diodes with Operational Stability by Using Organic Ammonium Cations as Passivating Agents

Kim

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Blue emissive perovskites can be prepared by incorporating chlorine into bromine‐based perovskites to tune their bandgap. However, mixed‐halide perovskites exhibit intrinsic phase instability, particularly under electrical potential, owing to halide migration. To achieve high‐performance blue perovskite‐based light‐emitting diodes (PeLEDs) with operational stability, organic ammonium cations are used for passivating the anionic defects of the CsPbBr2Cl film. Diphenylpropylammonium chloride (DPPACl), used as a passivating agent, successfully prevents the spectral instability of blue PeLEDs by passivating the Cl− vacancies. Consequently, the blue PeLED prepared with this passivating agent delivers excellent device performance with a maximum external quantum efficiency of 3.03%. Moreover, upon tuning the DPPACl concentration, the PeLED emits stably in the deep‐blue spectral region (464 nm) with a half‐life time of 420 s. Thus, the use of organic ammonium cation as a passivating agent is an effective strategy for developing high‐performance blue PeLEDs with operational stability.

show abstract

“…For instance, improving the crystallinity with passivated grain boundaries demonstrates stabilized PL spectra under continuous illumination. [129,145] Defects passivation, like passivation agent incorporation, [146] surface treatment, [140,147] is also promising for spectra stabilization. Despite these successes, the links between trap and spectral shift remain unclear.…”

Section: Methods Against Spectral Shiftmentioning

confidence: 99%

Color Tuning for Perovskite Light-Emitting Diodes

2020

Linköping Studies in Science and Technology. Dissertations

View full text Add to dashboard Cite

Metal halide perovskites (MHPs) are recognized as promising semiconductor materials for a variety of optical and electrical device applications due to their cost-effective and outstanding optoelectronic properties. As one of the most significant applications, perovskite light-emitting diodes (PeLEDs) hold promise for future lighting and display technologies, attributed to their high photoluminescence quantum yield (PLQY), high color purity, and tunable emission color. The emission colors of PeLEDs can be tuned by mixing the halide anions, adjusting the size of perovskite nanocrystals, or changing the dimensionality of perovskites. However, in practice, all these different approaches have their own advantages and challenges. This thesis centres around the color tunability of perovskites, aiming to develop PeLEDs with different colors using different approaches.

show abstract

Laser induced ion migration in all-inorganic mixed halide perovskite micro-platelets

Abstract: All-inorganic mixed hybrid halide micro-platelet single crystals were fabricated and the photoinduced ion migration mechanism was investigated.

Cited by 27 publications

References 33 publications

Halide Perovskite Lateral Heterostructures for Energy Routing Based Photonic Applications

Halide Perovskite Lateral Heterostructures for Energy Routing Based Photonic Applications

High‐Performance Perovskite‐Based Blue Light‐Emitting Diodes with Operational Stability by Using Organic Ammonium Cations as Passivating Agents

Color Tuning for Perovskite Light-Emitting Diodes

Contact Info

Product

Resources

About