White LEDs with limit luminous efficacy

White LEDs with limit luminous efficacy

Bibliografiske detaljer
Parent link:	AIP Conference Proceedings Vol. 1698 : Advanced Materials in Technology and Construction, AMTC-2015.— 2016.— [050002 , 8 p.]
Institution som forfatter:	Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра лазерной и световой техники (ЛиСТ)
Andre forfattere:	Lisitsyn V. M. Viktor Mikhailovich, Lukash V. S. Vitaly Sergeevich, Stepanov S. A. Sergey Aleksandrovich, Ju Yanyan
Summary:	Title screen In most promising widespread gallium nitride based LEDs emission is generated in the blue spectral region with a maximum at about 450 nm which is converted to visible light with the desired spectrum by means of phosphor. The thermal energy in the conversion is determined by the difference in the energies of excitation and emission quanta and the phosphor quantum yield. Heat losses manifest themselves as decrease in the luminous efficacy. LED heating significantly reduces its efficiency and life. In addition, while heating, the emission generation output and the efficiency of the emission conversion decrease. Therefore, the reduction of the energy losses caused by heating is crucial for LED development. In this paper, heat losses in phosphor-converted LEDs (hereinafter chips) during spectrum conversion are estimated. The limit values of the luminous efficacy for white LEDs are evaluated. Режим доступа: по договору с организацией-держателем ресурса
Udgivet:	2016
Fag:	электронный ресурс труды учёных ТПУ
Online adgang:	http://dx.doi.org/10.1063/1.4937863
Format:	Electronisk Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=647762

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