Single-crystal X-ray diffraction studies were performed at the UC Berkeley College of Chemistry Small Molecule X-ray Crystallography Facility and at beamline 12.2.1 of the Advanced Light Source, a US DOE Office of Science User Facility at Lawrence Berkeley National Laboratory under contract no. DE...
Photoluminescence lifetime measurements of CsFAGA single crystals reveal a remarkably longer carrier lifetime, two times greater than that of a CsFA single crystal (Supplementary Fig.8), indicating substantially reduced trap states in CsFAGA. In addition, the trap density of states extracted from the...
two types: the B(III) compounds with a formula of A3□B(III)X9and the B(IV) compounds with a formula of A2□B(IV)X6. Here, the sign of □ indicates vacancies. However, the formation of vacancies cuts the original 3D perovskite structure into a low dimension crystal structure, thereby...
Herein, high-quality single crystals of CH3NH3PbI3 were successfully prepared through a simple solution immersing method. The obtained CH3NH3PbI3 crystals showed the morphologies of nanowires and nanoplates, which were confirmed to belong to the same tetragonal phase. Both nanowire- and nanoplate-...
Perovskite single crystals have very low trap concentrations but their controlled growth into devices does not lend themselves to the advantages offered by solution-processing thin films such as roll-to-roll depositions. Here, we demonstrate the use of light and atmospheric treatments on ...
Electronic Structure and Optical Properties of α-CH3NH3PbBr3 Perovskite Single Crystal The electronic structure and related optical properties of an emerging thin-film photovoltaic material CH3NH3PbBr3 are studied. A block-shaped α-phase CH3... Ji-Sang,Park,Sukgeun,... - 《Journal of Physical...
(1016–1017 cm−3) is much higher than that in perovskite single crystals (109–1010 cm−3).38,39These defects have also been visualized by Stranks and co-workers using microscale PL measurements.39They found lower PL intensities at the grain boundaries than grain interiors, implying ...
Photoconductive characteristics of single-crystal CdS nanoribbons Nano Lett., 6 (2006), pp. 1887-1892 CrossrefView in ScopusGoogle Scholar 41 P. Irkhin, H. Najafov, V. Podzorov Steady-state photoconductivity and multi-particle interactions in high-mobility organic semiconductors Sci. Rep, 5 (20...
resolved photoluminescence (TRPL) decay plots were performed to estimate the charge carrier dynamics of various MAPbI3perovskite films (Figure 3b). Herein, a 765 nm single-wavelength light was used as an excitation source. The PL–decay curves were fitted with a bi-exponential decay model [44]...
approaching levels close to those of single crystals3. However, the slow radiative (bimolecular) recombination has limited the photoluminescence quantum efficiencies (PLQEs) of 3D perovskites to less than 80% (refs. 1,3), resulting in external quantum efficiencies (EQEs) of LED devices of less...