Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays
Owing to their composition-tunable and narrow emissions and high photoluminescence quantum yield (PLQY), inorganic halide perovskite quantum dots (IPQDs) are a promising option for wide color gamut displays. However, their practical applications have been limited by their lattice structure instabili...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/10/10/1113 |
| _version_ | 1797572600038162432 |
|---|---|
| author | Junhu Cai Xiaogang Chen Wenyan Zhang Longwen Yang Zexi Lin Wenxiao Zhao Yun Ye Sheng Xu Tailiang Guo Enguo Chen |
| author_facet | Junhu Cai Xiaogang Chen Wenyan Zhang Longwen Yang Zexi Lin Wenxiao Zhao Yun Ye Sheng Xu Tailiang Guo Enguo Chen |
| author_sort | Junhu Cai |
| collection | DOAJ |
| description | Owing to their composition-tunable and narrow emissions and high photoluminescence quantum yield (PLQY), inorganic halide perovskite quantum dots (IPQDs) are a promising option for wide color gamut displays. However, their practical applications have been limited by their lattice structure instability and surface defect states. Herein, CsPbBr<sub>3</sub>:KBF<sub>4</sub>@SiO<sub>2</sub> with improved stability and optical properties is successfully synthesized with a two-step optimization of fluorine (F) anion doping and SiO<sub>2</sub> in situ coating. Compared with bromide (Br), higher electronegativity and a smaller radius of F lead to stronger binding energy with Pb<sup>2+</sup>. Also, F anions can occupy surface Br vacancies. Then, benefiting from the acidic environment provided by BF<sub>4</sub><sup>−</sup> hydrolysis, tetraethyl orthosilicate (TEOS) can be more easily hydrolyzed on the CsPbBr<sub>3</sub>:KBF<sub>4</sub> surface to generate SiO<sub>2</sub> coating, thus further passivating lattice defects and improving environmental stability. Importantly, the PLQY of CsPbBr<sub>3</sub>:KBF<sub>4</sub>@SiO<sub>2</sub> achieves 85%, and the stability has been greatly improved compared with pure CsPbBr<sub>3</sub>. Finally, CsPbBr<sub>3</sub>:KBF<sub>4</sub>@SiO<sub>2</sub>/PDMS, CsPbI<sub>3</sub>/PDMS, and CsPbCl<sub>3</sub>/PDMS composites with narrow emissions are applied to replace traditional phosphors as color converters for direct-view light-emitting diode (LED) displays or liquid crystal display (LCD) backlights. The color gamut reaches 118.22% under the NTSC standard. Concerning the display field, it suggests likely applications in the future. |
| first_indexed | 2024-03-10T20:58:07Z |
| format | Article |
| id | doaj.art-f1f6da37794c4b48b547f1999a46a645 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T20:58:07Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-f1f6da37794c4b48b547f1999a46a6452023-11-19T17:47:11ZengMDPI AGPhotonics2304-67322023-10-011010111310.3390/photonics10101113Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut DisplaysJunhu Cai0Xiaogang Chen1Wenyan Zhang2Longwen Yang3Zexi Lin4Wenxiao Zhao5Yun Ye6Sheng Xu7Tailiang Guo8Enguo Chen9National & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaNational & Local United Engineer Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaOwing to their composition-tunable and narrow emissions and high photoluminescence quantum yield (PLQY), inorganic halide perovskite quantum dots (IPQDs) are a promising option for wide color gamut displays. However, their practical applications have been limited by their lattice structure instability and surface defect states. Herein, CsPbBr<sub>3</sub>:KBF<sub>4</sub>@SiO<sub>2</sub> with improved stability and optical properties is successfully synthesized with a two-step optimization of fluorine (F) anion doping and SiO<sub>2</sub> in situ coating. Compared with bromide (Br), higher electronegativity and a smaller radius of F lead to stronger binding energy with Pb<sup>2+</sup>. Also, F anions can occupy surface Br vacancies. Then, benefiting from the acidic environment provided by BF<sub>4</sub><sup>−</sup> hydrolysis, tetraethyl orthosilicate (TEOS) can be more easily hydrolyzed on the CsPbBr<sub>3</sub>:KBF<sub>4</sub> surface to generate SiO<sub>2</sub> coating, thus further passivating lattice defects and improving environmental stability. Importantly, the PLQY of CsPbBr<sub>3</sub>:KBF<sub>4</sub>@SiO<sub>2</sub> achieves 85%, and the stability has been greatly improved compared with pure CsPbBr<sub>3</sub>. Finally, CsPbBr<sub>3</sub>:KBF<sub>4</sub>@SiO<sub>2</sub>/PDMS, CsPbI<sub>3</sub>/PDMS, and CsPbCl<sub>3</sub>/PDMS composites with narrow emissions are applied to replace traditional phosphors as color converters for direct-view light-emitting diode (LED) displays or liquid crystal display (LCD) backlights. The color gamut reaches 118.22% under the NTSC standard. Concerning the display field, it suggests likely applications in the future.https://www.mdpi.com/2304-6732/10/10/1113CsPbBr<sub>3</sub>KBF<sub>4</sub>SiO<sub>2</sub>wide color gamutliquid crystal displaysLED displays |
| spellingShingle | Junhu Cai Xiaogang Chen Wenyan Zhang Longwen Yang Zexi Lin Wenxiao Zhao Yun Ye Sheng Xu Tailiang Guo Enguo Chen Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays Photonics CsPbBr<sub>3</sub> KBF<sub>4</sub> SiO<sub>2</sub> wide color gamut liquid crystal displays LED displays |
| title | Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays |
| title_full | Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays |
| title_fullStr | Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays |
| title_full_unstemmed | Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays |
| title_short | Two-Step Performance Optimization of CsPbBr<sub>3</sub> Perovskite Nanocrystals for Wide Color Gamut Displays |
| title_sort | two step performance optimization of cspbbr sub 3 sub perovskite nanocrystals for wide color gamut displays |
| topic | CsPbBr<sub>3</sub> KBF<sub>4</sub> SiO<sub>2</sub> wide color gamut liquid crystal displays LED displays |
| url | https://www.mdpi.com/2304-6732/10/10/1113 |
| work_keys_str_mv | AT junhucai twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT xiaogangchen twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT wenyanzhang twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT longwenyang twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT zexilin twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT wenxiaozhao twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT yunye twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT shengxu twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT tailiangguo twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays AT enguochen twostepperformanceoptimizationofcspbbrsub3subperovskitenanocrystalsforwidecolorgamutdisplays |