Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
The past five years have witnessed an unprecedented advance in the field of solar cells1with the perovskite metal halide, CH3NH3PbI3, the primary semiconductor of interest. The archetypical semiconductor forms nearly defect free, crystalline films at low temperatures that exhibit high optical absorption, long-range charge transport,2-3 and efficient charge collection, yielding solar cells that rival the performance of industry standard silicon, with verified record efficiency of 21%. In spite of the rapid growth in this area, primarily three dimensional (3D) perovskites with the general form ABX3 (A = Cs+, CH3NH3+, HC(NH2)2+; B = Pb2+, Sn2+, Ge2+; X = Cl-, Br-, I-) have been studied as light harvesters in solid-state devices.
The prospects for advancing photoconversion efficiencies and manufacturability are contingent upon addressing the current issues of toxicity and stability through rational design and synthesis leveraging on the versatility of halide perovskite family. One such structural variant is represented by lower-dimensionality layered perovskite derived from their 3D counterparts (ABX3) by increasing the distance between the interconnected inorganic sheets with the appropriate organic cations along the <100> direction; this gives the general form A2A’n-1BnX3n+1, where A and A’ represent organic cations, B are divalent metal ions and X are halides. Lower-dimensionality layered perovskites formulations permit for band gaps and binding energy tuning, unimpeded carrier mobility facilitated by the inorganic moeities, withthe organic moieties providing additional controls for stability,light harvesting, and intralayer charge transport.
This presentation will outline a broad palette of elemental substitutions, solid solutions, and multidimensional families that will provide the next step towards the advances of the perovskite solar cells and light-emitting devices. Challenges and opportunities in perovskite materials beyond methyl ammonium lead iodide,4-6 with particular emphasis on their optoelectronic properties and integration into solar cells and light-emitting devices, will also be addressed.
[1] Boix et al.; J Physical Chemistry Letters, 2015, 6, 5, 898-907
[2] Xing et al.; Nature materials, 2014, 13, 476-480
[3] Xing et al.; Science, 2013, 342, 344-347
[4] Mulmudi et al.; Advanced Materials, 2014, 26, 41, 7122-7128
[5] Cortecchia et al.; Inorganic Chemistry, Inorg. Chem. 2016, 55, 1044−1052
[6] Krishnamoorthy et al.; J. Mater. Chem. A, 2015,3, 23829-23832
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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.
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