Kamata, Norihiko, and Abu Zafor Md. Touhidul Islam. “Photoluminescence Characterization of Nonradiative Recombination Centers in Light Emitting Materials by Utilizing Below-Gap Excitation: A Mini Review of Two-Wavelength Excited Photoluminescence”. Rajshahi University Journal of Science and Engineering 43 (December 31, 2015): 1–9. Accessed June 18, 2024. https://www.banglajol.info/index.php/RUJSE/article/view/26158.