Hoang, Thu, Hoa Huynh, Phuong Pham, Hung Nguyen, Giang Le, and Trung Tran. 2019. “The Research and Fabrication of Graphene Quantum Dots Applied As the Hole Transporting Layer in Polymer Solar Cells”. Science & Technology Development Journal: Natural Sciences 2 (5), 113-21. https://doi.org/https://doi.org/10.32508/stdjns.v2i5.786.