Issue 8, 2019

Rapid synthesis of hybrid methylammonium lead iodide perovskite quantum dots and rich MnI2 substitution favouring Pb-free warm white LED applications

Abstract

We present a facile room temperature synthesis of CH3NH3Pb1−xMnxI3 perovskite quantum dots (PQDs) substituting manganese (Mn2+) at the lead (Pb2+) sites to minimize environmental pollution and make it commercially feasible. By varying the concentration of Mn2+ from 0 to 60%, the PQDs exhibit strong color tunability from red to orange color suggesting successful energy transfer due to Mn2+ inclusion. We observed a high external photoluminescence quantum yield (PLQY) of 98% for unsubstituted CH3NH3PbI3 and >50% for up to 15% Mn2+ substituted PQDs. The average lifetime of PQDs was found to shorten with increasing Mn2+ replacement. We demonstrate a white LED prototype by employing the CH3NH3Pb1−xMnxI3 PQDs with green QDs on a blue LED chip. The CRI and CCT value varying from 92 to 80 and 5100 K to 2900 K, respectively, indicate the usability of the Mn2+ substituted PQDs as efficient warm white LEDs with a promising CRI and good stability.

Graphical abstract: Rapid synthesis of hybrid methylammonium lead iodide perovskite quantum dots and rich MnI2 substitution favouring Pb-free warm white LED applications

Supplementary files

Article information

Article type
Paper
Submitted
26 may 2019
Accepted
06 iyn 2019
First published
07 iyn 2019
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2019,1, 2999-3008

Rapid synthesis of hybrid methylammonium lead iodide perovskite quantum dots and rich MnI2 substitution favouring Pb-free warm white LED applications

R. K. Singh, S. Som, S. Dutta, N. Jain, M. Kuo, J. Singh, R. Kumar and T. Chen, Nanoscale Adv., 2019, 1, 2999 DOI: 10.1039/C9NA00330D

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