Mechanism of Charge Transfer and Recombination Dynamics in Organo Metal Halide Perovskites and Organic Electrodes, PCBM, and Spiro-OMeTAD: Role of Dark Carriers

2015 ◽  
Vol 137 (51) ◽  
pp. 16043-16048 ◽  
Author(s):  
Carlito S. Ponseca ◽  
Eline M. Hutter ◽  
Piotr Piatkowski ◽  
Boiko Cohen ◽  
Torbjörn Pascher ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Metal Halide ◽  
Halide Perovskites ◽  
Recombination Dynamics ◽  
Organic Electrodes

Nonlinear photocarrier dynamics and the role of shallow traps in mixed-halide mixed-cation hybrid perovskites

2021 ◽  
Author(s):  
David Alberto Valverde-Chávez ◽  
Esteban Rojas-Gatjens ◽  
Jacob Williamson ◽  
Sarthak Jariwala ◽  
Yangwei Shi ◽  
...  
Keyword(s):  
Surface Passivation ◽  
Metal Halide ◽  
Carrier Trapping ◽  
Mixed Cation ◽  
Halide Perovskites ◽  
Shallow Traps ◽  
Recombination Dynamics

We examine the role of surface passivation on carrier trapping and nonlinear recombination dynamics in hybrid metal-halide perovskites by means of excitation correlation photoluminescence (ECPL) spectroscopy. We find that carrier...

scholarly journals Role of Polar Phonons in the Photo Excited State of Metal Halide Perovskites

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Menno Bokdam ◽  
Tobias Sander ◽  
Alessandro Stroppa ◽  
Silvia Picozzi ◽  
D. D. Sarma ◽  
...  
Keyword(s):  
Excited State ◽  
Metal Halide ◽  
Halide Perovskites

scholarly journals The Role of Grain Boundaries on Ionic Defect Migration in Metal Halide Perovskites

2020 ◽  
Vol 10 (20) ◽  
pp. 1903735 ◽  
Author(s):  
Nga Phung ◽  
Amran Al‐Ashouri ◽  
Simone Meloni ◽  
Alessandro Mattoni ◽  
Steve Albrecht ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Metal Halide ◽  
Defect Migration ◽  
Halide Perovskites ◽  
Ionic Defect

scholarly journals Strain in Metal Halide Perovskites: The Critical Role of A-Site Cation

2021 ◽  
Author(s):  
Yongtao Liu ◽  
Bobby G. Sumpter ◽  
Jong K. Keum ◽  
Bin Hu ◽  
Mahshid Ahmadi ◽  
...  
Keyword(s):  
Critical Role ◽  
Metal Halide ◽  
Halide Perovskites ◽  
A Site

Role of Spacer Cations and Structural Distortion in Two-Dimensional Germanium Halide Perovskites

2021 ◽  
Author(s):  
Lorenzo Malavasi ◽  
Luca Bindi ◽  
Mauro Coduri ◽  
Filippo De Angelis ◽  
Francesco Fracassi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Metal Halide ◽  
Structural Distortion ◽  
Two Dimensional ◽  
Structure Property ◽  
Structural Distortions ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite

The elucidation of the structure-property correlation in 2D metal halide perovskite is a key issue to understand the dependence of optical properties on structural distortions and to design novel tailored...

scholarly journals Large-Area Nanocrystalline Caesium Lead Chloride Thin Films: A Focus on the Exciton Recombination Dynamics

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 434
Author(s):  
Naomi Falsini ◽  
Nicola Calisi ◽  
Giammarco Roini ◽  
Andrea Ristori ◽  
Francesco Biccari ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantitative Information ◽  
Lead Chloride ◽  
Large Area ◽  
Temperature Dependent ◽  
Time Resolved ◽  
White Leds ◽  
Halide Perovskites ◽  
Recombination Dynamics

Caesium lead halide perovskites were recently demonstrated to be a relevant class of semiconductors for photonics and optoelectronics. Unlike CsPbBr3 and CsPbI3, the realization of high-quality thin films of CsPbCl3, particularly interesting for highly efficient white LEDs when coupled to converting phosphors, is still a very demanding task. In this work we report the first successful deposition of nanocrystalline CsPbCl3 thin films (70–150 nm) by radio frequency magnetron sputtering on large-area substrates. We present a detailed investigation of the optical properties by high resolution photoluminescence (PL) spectroscopy, resolved in time and space in the range 10–300 K, providing quantitative information concerning carriers and excitons recombination dynamics. The PL is characterized by a limited inhomogeneous broadening (~15 meV at 10 K) and its origin is discussed from detailed analysis with investigations at the micro-scale. The samples, obtained without any post-growth treatment, show a homogeneous PL emission in spectrum and intensity on large sample areas (several cm2). Temperature dependent and time-resolved PL spectra elucidate the role of carrier trapping in determining the PL quenching up to room temperature. Our results open the route for the realization of large-area inorganic halide perovskite films for photonic and optoelectronic devices.

Enhanced charge separation and photocatalytic hydrogen evolution in carbonized-polymer-dot-coupled lead halide perovskites

2020 ◽  
Vol 7 (10) ◽  
pp. 2719-2725 ◽  
Author(s):  
Yue Zhao ◽  
Qingsen Zeng ◽  
Yue Yu ◽  
Tanglue Feng ◽  
Yajie Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Metal Halide ◽  
Photocatalytic Hydrogen Evolution ◽  
Polymer Dots ◽  
Halide Perovskites ◽  
Lead Halide

This work demonstrates that carbonized polymer dots (CPDs) can efficiently promote the charge separation and photocatalytic performance of metal halide perovskites, highlighting their excellent charge-transfer ability and great potential in developing efficient perovskite-based hybrid photocatalysts.

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