차세대 에너지 연구실

Polymer solar cells(PSCs) are one of the photovoltaic(PV) devices producing electric current from a layer that is a blend of donor and acceptor polymers by absorbing the sunlight. As one of new PV technology, PSCs have great potential because of their renewable, environmentally guaranteed, flexible, lightweight and inexpensive fabrication properties. They made from organic solvents using solution processing and have various device structure by changing type of donor and acceptor polymers, hole and electron transport layer or metal electrode. Recently, large-scale, transparent and flexible PSCs are investigated. Perovskite Solar Cells(PVSCs) has great interests from many researchers because of PVSCs’ fascinated properties like high absorption coefficient and carrier mobility, long carrier diffusion length, tunable band gap and low exciton binding energy. The power conversion efficiency of PVSCs advanced from an initial 3.8% to a certified 25.2% by the solution processing. Recently, to study PVSCs’ high performance and stability, many researchers have tried to get better the quality of perovskite film and change the perovskite compositions and devices’ structures. Perovskite Light Emitting Diodes(LEDs) which could be next generation LEDs material are better color purity than any kinds of LEDs. In addition, perovskite has excellent opto-electrical property. So we can make more efficient, vivid, simple, light weight, close to natural color of LEDs. Perovskite we use in electronic devices are halide perovskite ABX3 structure. Monovalent cation is used A site. For most of halide perovskite, leads are used for B site and halides are used for X site. Based on this, band gap is tuned by composition of A-site cation and X-site halide. So luminous colors are also tuned. Hydrogen i