Polymer solar cells (PSCs) are one of 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.
Polymer Light-Emitting Diode
Polymer light emitting diode is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compounds which emit light in response to an electric current. This layer of organic semiconductor material is situated between two electrodes. Generally, at least one of these electrodes is transparent.
Hybrid Solar Cell
Hybrid solar cells combine advantages of both organic and inorganic semiconductors. Hybrid photovoltaics (PV) have organic materials that consist of conjugated polymers that absorb light as the donor and transport holes. Inorganic materials in hybrid cell are used as the acceptor and electron transporter in the structure. Opposite structure is also possible. Inorganic materials that absorb light as the donor and transport hole. Conjugated polymers or C60 derivatives as the acceptor and electron transporter in the structure. The hybrid photovoltaic devices have a significant potential for not only low-cost by roll-to-roll processing but also scalable solar power conversion.
Organic Field-Effect Transistor (OFET)
Organic field-effect transistor (or organic thin-film transistor) is a field-effect transistor whose channel is made up with organic semiconductors. Conjugated polymers or small molecules are typically used as a channel materials in OFETs. Bottom gate top contact (BGTC) structure is commonly used device geometry which is composed of Si(n++)/SiO2/Active layer/Au(or Al), where Si(n++) as a gate, SiO2 as a gate dielectric and Au(or Al) as a source and drain electrodes. Although its low mobility (~10-1 cm2V-1s-1) compared with inorganic FETs, the main advantages of OFETs are low-cost fabrication process, light weight and their flexibility to make flexible devices.
Colloidal Quantum Dot Solar Cell
Central to the entire discipline of “Colloidal quantum dot solar cells” is the use of colloidal quantum dots (CQDs) as a principal light absorber in solar cells. CQDs exhibit a tunability of optical properties of inorganic materials altering their geometrical shape or the degree of spatial confinement, as well as the availability of solution-processing, a impactful manufacturing technique in solar cells, to inorganic materials. These properties can give rise to the expansion of applicable area, such as photodiodes, light-emitting devices and photovoltaic devices with a low manufacturing cost.
Perovskite Solar Cell
Organometal halide perovskites have recently emerged as a promising material for high-efficiency nanostructured devices. Hybrid organic-inorganic metal halide perovskites with good intrinsic optoelectronic properties have been synthesized and used for photovoltaic cell applications. Perovskite absorbers have been used instead of the dye in dye-sensitized solar cells to deliver solid-state solar cells with a power conversion efficiency of over 10%. The outstanding performances of planar devices and solution-processable solar cells based on perovskites are also demonstrated.