Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Solid-state organic-inorganic perovskite (CH3NH3)PbX3 (X =Cl, Br, I) based nanostructured solar cells have recently gained a lot of attention due to their superior performance and ease of fabrication. At the lab scale, power conversion efficiencies exceeding 15 % have already been achieved utilizing a solution based two-step method to deposit the perovskite A power conversion efficiency of ~ 17 % has been identified as a realistic target, considering a short-circuit photocurrent density of 22 mAcm-2 (based on a 1.5 eV bandgap), a photovoltage of 1.1 V and a fill factor of 0.7. Now that it has been shown conclusively that the CH3NH3PbX3 perovskite layers can form highly efficient solar cells, efforts must focus on two areas (i) Unravelling the reasons for the high efficiency and (ii) focussing on technologically relevant challenges.
The talk will cover these two broad areas. Physical and photophysical characterization of these classes of compounds will be presented. The relevance of these properties in determining the high efficiencies as well as in predicting newer structures of perovskites will be shown. Photophysical characterization results showing the excellent carrier lengths in these classes of compounds will also be described. On the technological side, a cost effective low cost roll-to-roll production of solid state devices is only possible when the processing temperatures are brought down to 100-150 oC. A low temperature approach can have other interesting advantages such as the fabrication of flexible devices, due to the instability of plastic substrates at high temperatures. The utilisation of a ZnO compact layer formed by electrodepositon and ZnO nanorods grown by chemical bath deposition (CBD) allow the processing of low-temperature, solution based and flexible solid state perovskite CH3NH3PbI3 solar cells. Conversion efficiencies of 8.90 % were achieved on rigid substrates processed at low temperatures. Other efforts to utilise various mesoporous architectures will also be covered.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.