Le, Lam, and Tuan Luu. “An Investigation on the Optical Properties of Regioregular Poly(3-Hexylthiophene)”. Science and Technology Development Journal 17, no. 2 (June 30, 2014): 86-92. Accessed May 5, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1362.