Back to Search
Start Over
[(CH3)4N]2Mn0.6Zn0.4Br4: Lead-free MnII-based hybrid halide with high photoluminescence quantum yield for backlight displays.
- Source :
- Nano Research; Apr2023, Vol. 16 Issue 4, p5894-5899, 6p
- Publication Year :
- 2023
-
Abstract
- High efficient lead halide perovskites with wide-color gamut properties have emerged as new candidates for backlight displays. However, the toxicity of lead and the instability of halide perovskites greatly limit their practical applications. Herein, the luminescent powders of [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>MnBr<subscript>4</subscript> and [(CH<subscript>3</subscript>)<subscript>4</subscript>N]MnBr<subscript>3</subscript> were synthesized via a simple yet robust solvent evaporation method. [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>MnBr<subscript>4</subscript> with tetrahedral coordination Mn<superscript>2+</superscript> and [(CH<subscript>3</subscript>)<subscript>4</subscript>N]MnBr<subscript>3</subscript> with octahedral coordination Mn<superscript>2+</superscript> show green at 517 nm and red emission peaks at 620 nm, respectively, originating from the <superscript>4</superscript>T<subscript>1</subscript>-<superscript>6</superscript>A<subscript>1</subscript> transition of Mn<superscript>2+</superscript>. To enhance optical of manganese halide via effective alloying, Zn<superscript>2+</superscript>-doped [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>MnBr<subscript>4</subscript> was successfully prepared, and the quantum efficiency of [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>Mn<subscript>0.6</subscript>Zn<subscript>0.4</subscript>Br<subscript>4</subscript> was as high as 65%. Furthermore, [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>Mn<subscript>0.6</subscript>Zn<subscript>0.4</subscript>Br<subscript>4</subscript> exhibits better optical and thermal stability compared to [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>MnBr<subscript>4</subscript>. [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>Mn<subscript>0.6</subscript>Zn<subscript>0.4</subscript>Br<subscript>4</subscript>@CsPbBr<subscript>1.2</subscript>I<subscript>1.8</subscript> light conversion films with different green-to-red ratios are placed in backlight display devices, and their color gamut exceeds 106% of the National Television Standards Committee (NTSC) 1953 standard, which is superior to the currently reported Mn-based perovskite. This work broadly shows that the [(CH<subscript>3</subscript>)<subscript>4</subscript>N]<subscript>2</subscript>Mn<subscript>0.6</subscript>Zn<subscript>0.4</subscript>Br<subscript>4</subscript> will provide effective route to fabricate stable and high-performance lead-free liquid crystal displays. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 16
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 163869554
- Full Text :
- https://doi.org/10.1007/s12274-022-5152-2