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Li GG, Lin J (2014) Recent progress in low-voltage cathodoluminescent materials: synthesis, improvement and emission properties. Kang FW, Zhang Y, Peng MY (2015) Controlling the energy transfer via multi luminescent centers to achieve white light/tunable emissions in a single-phased X2-type Y 2SiO 5: Eu 3+, Bi 3+ phosphor for ultraviolet converted LEDs. Wu L, Ji MY, Wang HR, Kong YF, Zhang Y (2014) Site occupancy and photoluminescence of Sm 3+ in KSr 4(BO 3) 3: Sm 3+ phosphors. Hsu CH, Cheng BM, Lu CH (2011) Photoluminescent properties and energy transfer mechanism of color-tunable CaSi 2O 2N 2: Ce 3+, Eu 2+ phosphors. Zhang ZW, Song AJ, Yue Y, Zhong H, Zhang XY, Ma MZ, Liu RP (2015) White light emission from Ca 9Bi (PO 4) 7: Dy 3+ single-phase phosphors for light-emitting diodes. Wang J, Wang C, Feng Y, Liu HM (2015) Luminescence and energy transfer of a color tunable phosphor: Ba 2CaLa 1−xM x (PO 4) 3 (M = Dy, Tm, Eu) for warm white UV LEDs.

Ye S, Xiao F, Pan YX, Ma YY, Zhang QY (2010) Phosphors in phosphor-converted white light-emitting diodes: recent advances in materials, techniques and properties. After blending with polystyrene (PS), Mn-doped CAS QDs can be used as a single-component color conversion material for assembling white light LEDs. As a result, as-prepared Mn-doped CAS QDs give rise to a white light emission with Commission Internationale de l’Eclairage (CIE) color coordinates of (0.37, 0.33). Our result shows 19.3 times higher energy transfer efficiency for Mn-doped CAS than that of ordinary Mn-doped CsPb(Cl/Br) 3 nanocubes. The small size of zero-dimensional core in CAS structure has a strong quantum confinement effect, which can enhance the energy transfer efficiency from halide perovskite to Mn impurity dramatically.

In this work, we reported the synthesis of single-component white light halide perovskite quantum dots (QDs) by doping Mn into the host of CsPb(Cl/Br) x core–amorphous shell (CAS). As a potential candidate, Mn-doped lead halide perovskites are studied intensively, but rare works can realize pure white emission with a single component due to the challenge for realizing sufficient energy transfer efficiency from perovskite to Mn at the desirable emission wavelengths. Taking advantages of negligible reabsorption and no phase separation, single-component white-emitting phosphors are believed as new promising color conversion materials for white light-emitting diodes.