Organic Photocurrent Multiplication

Masahiro Hiramoto received his Ph.D. in chemistry from Osaka University in 1986 and began his research on organic semiconductors in 1988 in the Graduate School of Engineering, Osaka University, joining the Institute for Molecular Science in 2008 as a full professor. He has published over 150 papers, with research interests that include the photoelectric properties of organic semiconductors and their application to organic solar cells and organic devices. He is an inventor of the blended junction and tandem junction for organic solar cells. He is a discoverer of the photocurrent multiplication phenomenon in organic semiconductors, winning the Fellow Award from the Japan Society of Applied Physics in 2017.

• 1. Photocurrent Multiplication in Inorganic Semiconductor Films.- 2. Photocurrent Multiplication in Organic Semiconductor Films.- 3. Analyses of Multiplication Behaviors.- 4. Nature of Structural Trap.- 5. Photocurrent Multiplication at Organic/Organic Heterojunctions.- 6. Multiplied Photocurrent Oscillation with Negative Resistance.- 7. Avalanche Multiplication in Organic Single Crystals.- 8. Recent Progress and Future Perspective.