Open AccessEnhancement of luminous efficacy for LED lamps by introducing polyacrylonitrile electrospinning nanofiber film
Author(s) -
Yong Tang,
Zhi Li,
Guanwei Liang,
Jiasheng Li,
Binhai Yu
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.027716
Subject(s) - electrospinning , luminous flux , materials science , phosphor , luminous efficacy , nanofiber , polyacrylonitrile , led lamp , optoelectronics , light emitting diode , optics , layer (electronics) , composite material , polymer , physics , light source
Polyacrylonitrile electrospinning nanofiber film was introduced into a light emitting diode (LED) lamp to exploit the strong reflective and scattering effects. The light extraction mechanism was studied systematically for three different electrospinning types in three different types of LED lamps. For the all-electrospinning types, the luminous efficacy increased for the white LED, outwards remote phosphor layer, and inwards remote phosphor layer lamps by 10.98, 16.97, and 18.35%, respectively, compared with the reference lamp. Lamps with stronger backscatter had larger luminous efficacy enhancements. The reflector-electrospinning type helped redirect lights with large emission angles. The substrate-electrospinning type was beneficial for recycling the total interior reflection lights and increasing the yellow to blue ratio. Additionally, the all-electrospinning white LED lamps remains 97.89% luminous flux after a 96-hour aging process. Electrospinning fiber films are favorable luminous efficacy enhancers for the future generation of LED lamps.