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SUMMARY:Perovskite Solar Cells: Printing the future of photovoltaics - Stu
 art Macpherson (StranksLab\, Optoelectronics group\, Physics\, University 
 of Cambridge)
DTSTART:20181025T121000Z
DTEND:20181025T130000Z
UID:TALK111436@talks.cam.ac.uk
CONTACT:Miguel Anaya
DESCRIPTION:Organic-inorganic halide perovskites (OHPs) are the rising sta
 rs of photovoltaic (PV) and optoelectronic research [1]. With power conver
 sion efficiencies surging from 3.8% to 22.7% [2\,3] in the last 9 years\, 
 perovskite solar cells may form fierce competition to the incumbent silico
 n-based technology in the coming years. OHP materials possess many of the 
 properties needed for efficient solar energy conversion including strong a
 bsorption coefficients\, high carrier mobility and a tuneable direct bandg
 ap [1]. Solution-processed perovskite inks are deposited as polycrystallin
 e thin films using facile methods (spin coating\, spray coating\, printing
 )\, at low temperature. This ease of manufacturing provides a pathway to l
 arge-scale printable cells.\n\nNevertheless\, the performance of state-of-
 the-art OHP solar cells is still limited by defects\, which introduce para
 sitic non-radiative recombination (NRR) pathways through which energised c
 harges lose their energy to heat [4]. This premature recombination of char
 ge restrains the open-circuit voltage\, and hence the efficiency of device
 s.\n\nAfter an introduction to perovskite materials\, I will discuss curre
 nt research including the cutting edge science being investigated at the C
 avendish Laboratory. Finally\, I will explore the potential of perovskite 
 PV in the context of future global energy needs.\n\n[1] Stranks\, S. D. & 
 Snaith\, H. J. Metal-halide perovskites for photovoltaic and light-emittin
 g devices. Nature Nanotechnology 10\, 391-402 (2015). \n[2] Kojima\, A.\, 
 Teshima\, K.\, Shirai\, Y. and Miyasaka\, T. Organometal Halide Perovskite
 s as Visible-Light Sensitizers for Photovoltaic Cells. J. Am. Chem. Soc. 1
 31\, 6050-6051 (2009). \n[3] Green\, M. A. et al. Solar cell efficiency ta
 bles (version 51). Progress in Photovoltaics: Research and Applications 26
 \, 3-12 (2018). \n[4] Stranks\, S. D. Nonradiative Losses in Metal Halide 
 Perovskites. ACS Energy Letters 2\, 1515-1525 (2017).\n
LOCATION:The Richard King Room\, Darwin College
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