首页|Stable α-CsPbI3 with extremely red emission for expanding the color gamut
Stable α-CsPbI3 with extremely red emission for expanding the color gamut
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The wider color gamut represents the better reproducibility of the real natural colors.Perovskite materials exhibit promising potential in full-color wide-gamut displays because of the wide tunability and high saturability of their photon emission.However,the full-color wide gamut(＞100％Rec.2020)has not been constructed due to the lack of the extreme red primary color(～700 nm).Herein,the widest color gamut is realized,wherein α-CsPbI3 is used to generate the extreme red primary color.An in-situ encapsulation approach is advised to stabilize α-CsPbI3 at room temperature by means of polyvinylpyrrolidone(PVP).The α-CsPbI3 encapsulated by PVP(denoted as P-CPI)shows highly saturated(FWHM(full width at half maximum)～28 nm)and extremely(～697 nm)red emission.The green emission is provided by P-CPBr(CsPbBr3 with PVP)which is also synthesized using the universal in-situ encapsulation approach.With the assistance of a commercial GaN chip,the RGB gamut is extended to the widest(151％NTSC,113％Rec.2020).
all-inorganic perovskitewide color gamutLEDdisplaycarrier recombination
School of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China
Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Center(RECAST),College of Chemistry,Nankai University,Tianjin 300071,China
Jiangsu Key Lab on Opto-Electronic Technology,School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China
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