Photophysics of Organic-Inorganic Hybrid Lead Iodide Perovskite Single Crystals

Autor: Hong-Hua Fang, Mustapha Abdu-Aguye, Graeme R. Blake, Jacky Even, Raissa Raissa, Sampson Adjokatse, Maria Antonietta Loi
Přispěvatelé: Zernike Institute for Advanced Materials, University of Groningen [Groningen], Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Université européenne de Bretagne - European University of Brittany (UEB)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université européenne de Bretagne - European University of Brittany (UEB)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Centre National de la Recherche Scientifique (CNRS)-Télécom Bretagne, Photophysics and OptoElectronics, Solid State Materials for Electronics
Jazyk: angličtina
Rok vydání: 2015
Předmět:
optical properties
Materials science
Photoluminescence
Exciton
TRANSITIONS
02 engineering and technology
low temperature
010402 general chemistry
EXCITON
01 natural sciences
7. Clean energy
SEMICONDUCTORS
Biomaterials
Tetragonal crystal system
[SPI]Engineering Sciences [physics]
Condensed Matter::Materials Science
MOBILITIES
Phase (matter)
CH3NH3PBI3
Electrochemistry
[CHIM]Chemical Sciences
SOLAR-CELL APPLICATIONS
DEPOSITION
Perovskite (structure)
hybrid perovskites
[PHYS]Physics [physics]
business.industry
Transition temperature
BAND-EDGE PHOTOLUMINESCENCE
OPTICAL-PROPERTIES
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Electronic
Optical and Magnetic Materials
Chemical physics
Optoelectronics
ORGANOMETAL HALIDE PEROVSKITES
0210 nano-technology
Crystal twinning
business
single crystal
Single crystal
Zdroj: Advanced Functional Materials
Advanced Functional Materials, 2015, 25 (16), pp.2378-2385. ⟨10.1002/adfm.201404421⟩
Advanced Functional Materials, Wiley, 2015, 25 (16), pp.2378-2385. ⟨10.1002/adfm.201404421⟩
Advanced Functional Materials, 25(16), 2378-2385. WILEY-V C H VERLAG GMBH
ISSN: 1616-301X
1616-3028
Popis: International audience; Hybrid organometal halide perovskites have been demonstrated to have outstanding performance as semiconductors for solar energy conversion. Further improvement of the efficiency and stability of these devices requires a deeper understanding of their intrinsic photophysical properties. Here, the structural and optical properties of high-quality single crystals of CH3NH3PbI3 from room temperature to 5 K are investigated. X-ray diffraction reveals an extremely sharp transition at 163 K from a twinned tetragonal I4/mcm phase to a low-temperature phase characterized by complex twinning and possible frozen disorder. Above the transition temperature, the photoluminescence is in agreement with a band-edge transition, explaining the outstanding performances of the solar cells. Whereas below the transition temperature, three different excitonic features arise, one of which is attributed to a free-exciton and the other two to bound excitons (BEs). The BEs are characterized by a decay dynamics of about 5 μs and by a saturation phenomenon at high power excitation. The long lifetime and the saturation effect make us attribute these low temperature features to bound triplet excitons. This results in a description of the room temperature recombination as being due to spontaneous band-to-band radiative transitions, whereas a diffusion-limited behavior is expected for the low-temperature range.
Databáze: OpenAIRE
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