TY - JOUR
T1 - Quantification of the quantum efficiency of radiation of a freestanding GaN crystal placed outside an integrating sphere
AU - Kojima, Kazunobu
AU - Ikemura, Kenichiro
AU - Chichibu, Shigefusa F.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - An ideal method to quantify the internal quantum efficiency (IQE) of radiation for condensed-matter placed outside an integrating sphere (φ-configuration) is demonstrated by showing the data for a freestanding GaN crystal using improved omnidirectional photoluminescence (ODPL) spectroscopy, Kojima et al. [J. Appl. Phys. 120, 015704 (2016)]. The crystal is optically coupled with the sphere through a pinhole fabricated on the sphere, and thus ODPL with φ-configuration gives IQE because the light-escaping cone for the crystal defines the observable photoluminescence owing to the large absorption and crystal thickness. This nondestructive ODPL configuration is applicable to large size crystals or semiconductor wafers.
AB - An ideal method to quantify the internal quantum efficiency (IQE) of radiation for condensed-matter placed outside an integrating sphere (φ-configuration) is demonstrated by showing the data for a freestanding GaN crystal using improved omnidirectional photoluminescence (ODPL) spectroscopy, Kojima et al. [J. Appl. Phys. 120, 015704 (2016)]. The crystal is optically coupled with the sphere through a pinhole fabricated on the sphere, and thus ODPL with φ-configuration gives IQE because the light-escaping cone for the crystal defines the observable photoluminescence owing to the large absorption and crystal thickness. This nondestructive ODPL configuration is applicable to large size crystals or semiconductor wafers.
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U2 - 10.7567/1882-0786/ab2165
DO - 10.7567/1882-0786/ab2165
M3 - Article
AN - SCOPUS:85069523683
VL - 12
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 6
M1 - 062010
ER -