Organic and Hybrid Photovoltaics 

Solar cells that converting light energy into electricity where silicon based devices are popular and demonstrating very high-power conversion efficiencies (~ 20-30%) due to their adequate band gap and semiconducting properties. However, the processing conditions for preparing amorphous silicon films and devices are not cost effective and several alternative candidates have been proposed. Among them, organic semiconductor based solar cells are one of the notable replacements that can processed on plastic substrates. A bulk donor/acceptor heterojunction made of two different organic materials acts as a junction to dissociate the incoming exciton into charge carriers. Recently, hybrid approaches containing organic-inorganic semiconductor also reported to overcome the tedious process employed with silicon solar cells. In all devices, the charge extraction from the absorption layer is a challengeable and proper interface alignment required for the superior performances.

References: 

1)Seung Yoon Ryu*, Jihoon Seo, Hassan Hafeez, Myungkwan Song, Jun Young Shin, Dong Hyun Kim, Yong Chan Jung and Chang-Su Kim*, "Effects of the Wrinkle Structure and Flat Structure Formed during Static Low-Temperature Annealing of ZnO on the Performance of Inverted Polymer Solar Cells", The Journal of Physical Chemistry C, 121 (2017) 9191–9201.

2)Seung Yoon Ryu*, Jihoon Seo, Hassan Hafeez, Myungkwan Song, Jun Young Shin, Dong Hyun Kim, Yong Chan Jung, and Chang-Su Kim*, "Improved Hydrogenated Amorphous Silicon Thin-Film Solar Cells by Replacing n-type Si Layer with PFN Interfacial Layer", Synthetic Metals,  Vol. 228, 91–98, (2017)

Display Convergence, Division of Display and Semiconductor Physics, College of Science and Technology,  Korea University Sejong Campus

2511 Sejong-ro, Sejong City, 339-770, Republic of Korea