Letter pubs.acs.org/JPCL
Ultrafast Charge Generation in an Organic Bilayer Film Loren G. Kaake,† Chengmei Zhong,†,‡ John A. Love,† Ikuhiro Nagao,§ Guillermo C. Bazan,†,∥ Thuc-Quyen Nguyen,†,∥,⊥ Fei Huang,‡ Yong Cao,‡ Daniel Moses,† and Alan J. Heeger*,†,§,# †
Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106-5090, United States Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 People’s Republic of China § Functional Materials Chemistry Group, Polymer Materials Unit National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan ∥ Department of Chemistry, University of California, Santa Barbara, California, 93106-9510, United States ⊥ Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 22254, Saudi Arabia # Department of Physics, University of California, Santa Barbara, California, 93106-9530, United States ‡
S Supporting Information *
ABSTRACT: The dynamics of charge generation in a high performing molecular photovoltaic system, p-SIDT(FBTTh2)2 (see Figure 1) is studied with transient absorption. The optimized bulk heterojunction material shows behavior observed in many other systems; the majority of charges are generated at short time scales (
