SPIE Proceedings [SPIE Photonic Devices + Applications - San Diego, CA (Sunday 10 August 2008)] Organic Light Emitting Materials and Devices XII - Does giant surface potential modify the performance of Alq 3 -based OLED?: voltage shift and charge traps induced by light irradiationNoguchi, Yutaka; So, Franky; Adachi, Chihaya; Sato, Naoki; Tanaka, Yuya; Nakayama, Yasuo; Ishii, Hisao · 2008