Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
I will address the chemical and physical properties that make hybrid halide perovskites unique, and present novel routes to Pb-free solar cells.
My research group has been addressing the origin of the success of methylammonium lead iodide solar cells from multi-scale materials modelling [1-5]. These organic-inorganic materials satisfy the optoelectronic criteria for an active photovoltaic layer, i.e. spectral response in the visible range combined with light electron and hole effective masses. In addition, these systems are structurally and compositionally flexible with large dielectric constants, and the ability to alloy on each of the lattice sites. I will discuss issues ranging from disorder associated with molecular vibrations and rotations within the inorganic network, to microscopic polarisation arising from correlations in crystal dipole orientations.
The temporal behaviour of hybrid perovskites has recently been validated through a combination of neutron scattering, time-resolved vibrational spectroscopy, and kinetic measurements of the current-voltage response. The implications for reducing electron-hole recombination rates will be addressed. Finally, the potential for achieving similar performance from Sn, Sb and Bi based semiconductors will be discussed.
The work has been funded by the ERC, Royal Society and ESPRC, with a wide collaboration network including simulations performed by Jarvist Frost, Federico Brivio and Keith Butler at Bath.
1. “Atomistic origins of high-performance in hybrid halide perovskite solar cells” Nano Letters, 14, 2584 (2014)
2. “Molecular ferroelectric contributions to anomalous hysteresis in hybrid perovskite solar cells” APL Materials 2, 081506 (2014)
3. “Self-regulation mechanism for charged point defects in hybrid halide perovskites” Angewandte Chemie Int. Ed. 54, 1791 (2015)
4. “Ionic transport in hybrid lead iodide perovskite solar cells” Nature Communications 6, 7497 (2015)
5. “Role of microstructure in the electron–hole interaction of hybrid lead halide perovskites” Nature Photonics 9, 695 (2015)
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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.