Low Dark-Current, High Current-Gain of PVK/ZnO Nanoparticles Composite-Based UV Photodetector by PN-Heterojunction Control. - Sang-Won Lee 011; Seung-Hwan Cha; Kyung-Jae Choi; Byoung-Ho Kang; Jae-Sung Lee; Sae-Wan Kim; Ju-Seong Kim; Hyun-Min Jeong; Sai Anand Gopalan; Dae-Hyuk Kwon; Shin-Won Kang (Sensors, 2016)