Investigation of broadband emitting Butylammonium Tin Bromide phosphor for WLED application

• Main Author: Muhamad Rafiq Jamil
• Other Authors: Fei Duan
• Format: Final Year Project
• Language: English
• Published: 2018
• Subjects: DRNTU::Engineering::Materials::Photonics and optoelectronics materials
• Online Access: http://hdl.handle.net/10356/75636
• Institution: Nanyang Technological University

Yttrium aluminium garnet (Y3 Al5 O12: Ce3+, YAG:Ce) is the most commercially used phosphors for white light emitting diodes. However, the production of this phosphor is difficult because of the elevated temperature needed. This paper reports the investigation of Butylammonium Tin Bromide (BTB) (C4H9NH3)6SnBr8 perovskite as phosphor for white LEDs. Single crystals of BTB were grown and BTB crystals were broken down by Ultrasonic Homogenizer. The resulted powder was tested for its photophysical properties using a HORIBA FluoroMax-4 Spectrofluorometer, and its structure and composition using a Schottky Field Emission Scanning Electron Microscope and XRD D8 Advance. The results shown a calculated photoluminescence quantum yield of 25%. The structure and composition of the powder is the same as the crystals grown and it is possible to produce white light with excitation at 330 nm using uv-LED. Based on the results, BTB perovskite is suitable of emitting light of the white light covering the visible region. Also as the synthesis of BTB is easier and requires a much lower temperature than YAG:Ce, it can be said that BTB would likely be a better substitute for YAG:Ce in white LEDs provided the PLQE is improved beyond 90 %.