scholarly journals Charge Carrier Dynamics upon Sub-bandgap Excitation in Methylammonium Lead Iodide Thin Films: Effects of Urbach Tail, Deep Defects, and Two-Photon Absorption

2020 ◽  
Vol 5 (12) ◽  
pp. 3821-3827
Author(s):  
Valentina M. Caselli ◽  
Zimu Wei ◽  
Marnix M. Ackermans ◽  
Eline M. Hutter ◽  
Bruno Ehrler ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Carrier Dynamics ◽  
Photon Absorption ◽  
Lead Iodide ◽  
Urbach Tail ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Charge Carrier Dynamics ◽  
Methylammonium Lead Iodide

Investigation of free charge carrier dynamics in single-crystalline CVD diamond by two-photon absorption

2014 ◽  
Vol 44 (11) ◽  
pp. 1055-1060 ◽  
Author(s):  
E V Ivakin ◽  
I G Kisialiou ◽  
V G Ralchenko ◽  
A P Bolshakov ◽  
E E Ashkinazi ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Free Charge Carrier ◽  
Cvd Diamond ◽  
Carrier Dynamics ◽  
Photon Absorption ◽  
Free Charge ◽  
Single Crystalline ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Charge Carrier Dynamics

scholarly journals The importance of relativistic effects on two-photon absorption spectra in metal halide perovskites

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Zimu Wei ◽  
Dengyang Guo ◽  
Jos Thieme ◽  
Claudine Katan ◽  
Valentina M. Caselli ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectra ◽  
Metal Halide ◽  
Photon Absorption ◽  
Lead Iodide ◽  
Upward Trend ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Halide Perovskites ◽  
Methylammonium Lead Iodide

AbstractDespite intense research into the optoelectronic properties of metal halide perovskites (MHPs), sub-bandgap absorption in MHPs remains largely unexplored. Here we recorded two-photon absorption spectra of MHPs using the time-resolved microwave conductivity technique. A two-step upward trend is observed in the two-photon absorption spectrum for methylammonium lead iodide, and some analogues, which implies that the commonly used scaling law is not applicable to MHPs. This aspect is further confirmed by temperature-dependent conductivity measurements. Using an empirical multiband tight binding model, spectra for methylammonium lead iodide were calculated by integration over the entire Brillouin zone, showing compelling similarity with experimental results. We conclude that the second upward trend in the two-photon absorption spectrum originates from additional optical transitions to the heavy and light electron bands formed by the strong spin-orbit coupling. Hence, valuable insight can be obtained in the opto-electronic properties of MHPs by sub-bandgap spectroscopy, complemented by modelling.

scholarly journals Charge carrier dynamics of methylammonium lead iodide: from PbI2-rich to low-dimensional broadly emitting perovskites

2016 ◽  
Vol 18 (16) ◽  
pp. 10800-10808 ◽  
Author(s):  
Johannes R. Klein ◽  
Oliver Flender ◽  
Mirko Scholz ◽  
Kawon Oum ◽  
Thomas Lenzer
Keyword(s):  
Charge Carrier ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Lead Iodide ◽  
Charge Carrier Dynamics ◽  
Carrier Recombination ◽  
Recombination Rate Constant ◽  
Low Dimensional ◽  
Methylammonium Lead Iodide

Broadband transient absorption spectroscopy reveals an increased carrier recombination rate constant of low-dimensional perovskites.

scholarly journals Ultrafast Charge Carrier Dynamics in Vanadium-Modified TiO2 Thin Films and Its Relation to Their Photoelectrocatalytic Efficiency for Water Splitting

2020 ◽  
Vol 124 (49) ◽  
pp. 26572-26582
Author(s):  
Alberto Piccioni ◽  
Daniele Catone ◽  
Alessandra Paladini ◽  
Patrick O’Keeffe ◽  
Alex Boschi ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Water Splitting ◽  
Carrier Dynamics ◽  
Tio2 Thin Films ◽  
Charge Carrier Dynamics

Two-photon absorption spectrum of 3-butoxycarbonylmethylurethane polydiacetylene thin films

1998 ◽  
Vol 108 (10) ◽  
pp. 4319-4323 ◽  
Author(s):  
GianPiero Banfi ◽  
Davide Fortusini ◽  
Paolo Dainesi ◽  
Daniela Grando ◽  
Stefano Sottini
Keyword(s):  
Thin Films ◽  
Absorption Spectrum ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon
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