[13a-A405-1~11] 12.2 Characterization and Materials Physics

▲ [13a-A405-6] Lateral Junctions Reaching 1 cm for Organic Solar Cells

〇Jaseela Palasheriithikkal^1,2, A. Girault^1,3, Yusuke Yabara¹, Seiichiro Izawa^1,2, Masahiro Hiramoto^1,2 (1.IMS, 2.SOKENDAI, 3.Chimie ParisTech Ecole nationale superieure de chimie de Paris)

Keywords:organic solar cells, long length carrier transport, mobility

We fabricated lateral junction cells having distance reaching cm order. A donor [C8-BTBT (m_h = 43 cm²V^-1s^-1)] – acceptor [PTCDI-C8 (m_e = 1.7 cm²V^-1s^-1)] combination was used. Buffer layers of BCP and MoO₃ were used for the selective carrier collection of electrons and holes, respectively . Even lateral cells with L=10 mm showed clear photovoltaic behavior. Short-circuit photocurrent (Isc) decreases with increase of lateral electrode distance (L) above 2 mm due to electron transport limit . On the other hand, hole transport limit exceeds 10 mm. Thus, operation of lateral junction cells of the order of cm was demonstrated.