ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes
The persistent operational instability of all-inorganic cesium lead halide (CsPbX<sub>3</sub>) perovskite nanocrystals (NCs) has hindered their integration into white-light-emitting diodes (WLEDs). This study introduces a transformative approach by engineering a phase transition from CsP...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/15/9/674 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850155332719869952 |
|---|---|
| author | Muhammad Amin Padhiar Yongqiang Ji Jing Wang Noor Zamin Khan Mengji Xiong Shuxin Wang |
| author_facet | Muhammad Amin Padhiar Yongqiang Ji Jing Wang Noor Zamin Khan Mengji Xiong Shuxin Wang |
| author_sort | Muhammad Amin Padhiar |
| collection | DOAJ |
| description | The persistent operational instability of all-inorganic cesium lead halide (CsPbX<sub>3</sub>) perovskite nanocrystals (NCs) has hindered their integration into white-light-emitting diodes (WLEDs). This study introduces a transformative approach by engineering a phase transition from CsPbBr<sub>3</sub> NCs to zirconium bromide (ZrBr<sub>4</sub>)-stabilized hexagonal nanocomposites (HNs) through a modified hot-injection synthesis. Structural analyses revealed that the ZrBr<sub>4</sub>-mediated phase transformation induced a structurally ordered lattice with minimized defects, significantly enhancing charge carrier confinement and radiative recombination efficiency. The resulting HNs achieved an exceptional photoluminescence quantum yield (PLQY) of 92%, prolonged emission lifetimes, and suppressed nonradiative decay, attributed to effective surface passivation. The WLEDs with HNs enabled a breakthrough luminous efficiency of 158 lm/W and a record color rendering index (CRI) of 98, outperforming conventional CsPbX<sub>3</sub>-based devices. The WLEDs exhibited robust thermal stability, retaining over 80% of initial emission intensity at 100 °C, and demonstrated exceptional operational stability with negligible PL degradation during 50 h of continuous operation at 100 mA. Commission Internationale de l’Éclairage (CIE) coordinates of (0.35, 0.32) validated pure white-light emission with high chromatic fidelity. This work establishes ZrBr<sub>4</sub>-mediated HNs as a paradigm-shifting material platform, addressing critical stability and efficiency challenges in perovskite optoelectronics and paving the way for next-generation, high-performance lighting solutions. |
| format | Article |
| id | doaj-art-2f04ca1c818f4c9c857746c72707ea9b |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-2f04ca1c818f4c9c857746c72707ea9b2025-08-20T02:24:58ZengMDPI AGNanomaterials2079-49912025-04-0115967410.3390/nano15090674ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting DiodesMuhammad Amin Padhiar0Yongqiang Ji1Jing Wang2Noor Zamin Khan3Mengji Xiong4Shuxin Wang5School of Intelligent Manufacturing, Shanghai Zhongqiao Vocational and Technical University, Shanghai 201205, ChinaInstitute of Physics, Henan Academy of Sciences, Zhengzhou 450046, ChinaSchool of Intelligent Manufacturing, Shanghai Zhongqiao Vocational and Technical University, Shanghai 201205, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Intelligent Manufacturing, Shanghai Zhongqiao Vocational and Technical University, Shanghai 201205, ChinaSchool of Intelligent Manufacturing, Shanghai Zhongqiao Vocational and Technical University, Shanghai 201205, ChinaThe persistent operational instability of all-inorganic cesium lead halide (CsPbX<sub>3</sub>) perovskite nanocrystals (NCs) has hindered their integration into white-light-emitting diodes (WLEDs). This study introduces a transformative approach by engineering a phase transition from CsPbBr<sub>3</sub> NCs to zirconium bromide (ZrBr<sub>4</sub>)-stabilized hexagonal nanocomposites (HNs) through a modified hot-injection synthesis. Structural analyses revealed that the ZrBr<sub>4</sub>-mediated phase transformation induced a structurally ordered lattice with minimized defects, significantly enhancing charge carrier confinement and radiative recombination efficiency. The resulting HNs achieved an exceptional photoluminescence quantum yield (PLQY) of 92%, prolonged emission lifetimes, and suppressed nonradiative decay, attributed to effective surface passivation. The WLEDs with HNs enabled a breakthrough luminous efficiency of 158 lm/W and a record color rendering index (CRI) of 98, outperforming conventional CsPbX<sub>3</sub>-based devices. The WLEDs exhibited robust thermal stability, retaining over 80% of initial emission intensity at 100 °C, and demonstrated exceptional operational stability with negligible PL degradation during 50 h of continuous operation at 100 mA. Commission Internationale de l’Éclairage (CIE) coordinates of (0.35, 0.32) validated pure white-light emission with high chromatic fidelity. This work establishes ZrBr<sub>4</sub>-mediated HNs as a paradigm-shifting material platform, addressing critical stability and efficiency challenges in perovskite optoelectronics and paving the way for next-generation, high-performance lighting solutions.https://www.mdpi.com/2079-4991/15/9/674all-inorganic perovskite nanocrystalsphase transformationradiative recombinationwhite-light-emitting diodes (WLEDs)luminous efficiencyoperational stability |
| spellingShingle | Muhammad Amin Padhiar Yongqiang Ji Jing Wang Noor Zamin Khan Mengji Xiong Shuxin Wang ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes Nanomaterials all-inorganic perovskite nanocrystals phase transformation radiative recombination white-light-emitting diodes (WLEDs) luminous efficiency operational stability |
| title | ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes |
| title_full | ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes |
| title_fullStr | ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes |
| title_full_unstemmed | ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes |
| title_short | ZrBr<sub>4</sub>-Mediated Phase Engineering in CsPbBr<sub>3</sub> for Enhanced Operational Stability of White-Light-Emitting Diodes |
| title_sort | zrbr sub 4 sub mediated phase engineering in cspbbr sub 3 sub for enhanced operational stability of white light emitting diodes |
| topic | all-inorganic perovskite nanocrystals phase transformation radiative recombination white-light-emitting diodes (WLEDs) luminous efficiency operational stability |
| url | https://www.mdpi.com/2079-4991/15/9/674 |
| work_keys_str_mv | AT muhammadaminpadhiar zrbrsub4submediatedphaseengineeringincspbbrsub3subforenhancedoperationalstabilityofwhitelightemittingdiodes AT yongqiangji zrbrsub4submediatedphaseengineeringincspbbrsub3subforenhancedoperationalstabilityofwhitelightemittingdiodes AT jingwang zrbrsub4submediatedphaseengineeringincspbbrsub3subforenhancedoperationalstabilityofwhitelightemittingdiodes AT noorzaminkhan zrbrsub4submediatedphaseengineeringincspbbrsub3subforenhancedoperationalstabilityofwhitelightemittingdiodes AT mengjixiong zrbrsub4submediatedphaseengineeringincspbbrsub3subforenhancedoperationalstabilityofwhitelightemittingdiodes AT shuxinwang zrbrsub4submediatedphaseengineeringincspbbrsub3subforenhancedoperationalstabilityofwhitelightemittingdiodes |