Journal
ADVANCED OPTICAL MATERIALS
Volume 9, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202001135
Keywords
2D perovskites; colloidal quantum‐ wells; dual emission; energy transfer; Mn doping
Categories
Funding
- Chinese Postdoctoral Science Foundation [2019M661008]
- National Natural Science Foundation of China [52002269, 21833005, 21790364]
- Ministry of Science and Technology of China [2017YFA0204503]
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Atomically thin monolayer Mn2+-alloyed 2D Ruddlesden-Popper perovskite colloidal quantum wells show efficient tunable emitter with wide color gamut. By precisely controlling the chemical compositions, dual color emissions and single-component white emitter with high PLQY are achieved, demonstrating great potential for next generation lighting and display technologies.
Atomically thin monolayer Mn2+-alloyed 2D Ruddlesden-Popper (RP) perovskite colloidal quantum wells (CQWs) are demonstrated as efficiently tunable emitter with wide color gamut. Ultrathin character evidenced by the well-controlled thickness of approximate to 1.8 nm, leads to alloying rather than doping mechanism reported previously, which facilitates uniform and large-ratio substitution of Pb2+ by Mn2+ within the metal-halide octahedra layer. Photoluminescence spectra reveal dual color emissions constituted by blue-greenish intrinsic excitonic emission and reddish Mn2+ emission with a high photoluminescence quantum yield (PLQY) up to 32%. Two individual channels are created for precisely targeting the emission color in a wide gamut by finely controlling the excitonic emission via the chemical compositions of Br/I and the Mn2+ emission via the chemical compositions of Mn/Pb, respectively. Experimentally, high quality single-component white emitter ultrathin CQWs are achieved with CIE coordinate value of (0.33, 0.32), 21% PLQY, and good film processibility. The results reveal great potential as applicant for next generation lighting and display technologies.
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