Extended carrier lifetimes and diffusion in hybrid perovskites revealed by Hall effect and photoconductivity measurements.
Yun Sheng Chen,Yun Sheng Chen,H. T. Yi,Xiaoxi Wu,Ross Haroldson,Yuri N. Gartstein,Yaroslav Rodionov,Konstantin S. Tikhonov,Anvar A. Zakhidov,Anvar A. Zakhidov,Xiaoyang Zhu,Vitaly Podzorov +11 more
TLDR
The intrinsic Hall mobility and photocarrier recombination coefficient are directly measured in hybrid perovskites in steady-state transport studies and it is suggested that these experimental findings are consistent with the polaronic nature of charge carriers, resulting from an interaction of charges with methylammonium dipoles.Abstract:
Impressive performance of hybrid perovskite solar cells reported in recent years still awaits a comprehensive understanding of its microscopic origins. In this work, the intrinsic Hall mobility and photocarrier recombination coefficient are directly measured in these materials in steady-state transport studies. The results show that electron-hole recombination and carrier trapping rates in hybrid perovskites are very low. The bimolecular recombination coefficient (10(-11) to 10(-10) cm(3) s(-1)) is found to be on par with that in the best direct-band inorganic semiconductors, even though the intrinsic Hall mobility in hybrid perovskites is considerably lower (up to 60 cm(2) V(-1) s(-1)). Measured here, steady-state carrier lifetimes (of up to 3 ms) and diffusion lengths (as long as 650 μm) are significantly longer than those in high-purity crystalline inorganic semiconductors. We suggest that these experimental findings are consistent with the polaronic nature of charge carriers, resulting from an interaction of charges with methylammonium dipoles.read more
Citations
More filters
Journal ArticleDOI
Understanding the physical properties of hybrid perovskites for photovoltaic applications
TL;DR: In this paper, a review summarizes advances in understanding the unique physical properties of hybrid perovskites that enable the fabrication of high-efficiency solar cells with high open-circuit voltages, which is crucial for their further development towards commercialization.
Journal ArticleDOI
Critical assessment of charge mobility extraction in FETs
TL;DR: This work outlines some of the common pitfalls of mobility extraction from field-effect transistor (FET) measurements and proposes practical recommendations to avoid reporting erroneous mobilities in publications.
Journal ArticleDOI
Large polarons in lead halide perovskites
Kiyoshi Miyata,Daniele Meggiolaro,Daniele Meggiolaro,M. Tuan Trinh,Prakriti P. Joshi,Edoardo Mosconi,Edoardo Mosconi,Skyler C. Jones,Filippo De Angelis,Filippo De Angelis,Xiaoyang Zhu +10 more
TL;DR: It is found that large polaron forms predominantly from the deformation of the PbBr3− frameworks, irrespective of the cation type, and there are likely no mechanistic limitations in using all-inorganic or mixed-cation lead halide perovskites to overcome instability problems and to tune the balance between charge carrier protection and mobility.
Journal ArticleDOI
Response to comment on "Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells"
TL;DR: Drive-level capacitance profiling was used to map the spatial and energetic distribution of trap states in both polycrystalline and single-crystal perovskite solar cells, finding that most deep traps were detected near the interface ofperovskites and hole transport layers, where a large density of nanocrystals were embedded, limiting the efficiency of solar cells.
Journal ArticleDOI
Iodine chemistry determines the defect tolerance of lead-halide perovskites
Daniele Meggiolaro,Silvia G. Motti,Silvia G. Motti,Edoardo Mosconi,Alex J. Barker,James M. Ball,Carlo Andrea Riccardo Perini,Felix Deschler,Annamaria Petrozza,Filippo De Angelis +9 more
TL;DR: In this paper, the authors identify less abundant iodine defects as the source of photochemically active deep electron and hole traps in MAPbI3 and explain the defect tolerance of mixed-halide perovskites.
References
More filters
Journal ArticleDOI
Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells
TL;DR: Two organolead halide perovskite nanocrystals were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells, which exhibit strong band-gap absorptions as semiconductors.
Journal ArticleDOI
Sequential deposition as a route to high-performance perovskite-sensitized solar cells
Julian Burschka,Norman Pellet,Norman Pellet,Soo-Jin Moon,Robin Humphry-Baker,Peng Gao,Mohammad Khaja Nazeeruddin,Michael Grätzel +7 more
TL;DR: A sequential deposition method for the formation of the perovskite pigment within the porous metal oxide film that greatly increases the reproducibility of their performance and allows the fabrication of solid-state mesoscopic solar cells with unprecedented power conversion efficiencies and high stability.
Journal ArticleDOI
Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9%
Hui-Seon Kim,Chang-Ryul Lee,Jeong-Hyeok Im,Ki Beom Lee,Thomas Moehl,Arianna Marchioro,Soo-Jin Moon,Robin Humphry-Baker,Jun-Ho Yum,Jacques-E. Moser,Michael Grätzel,Nam-Gyu Park +11 more
TL;DR: The use of a solid hole conductor dramatically improved the device stability compared to (CH3NH3)PbI3 -sensitized liquid junction cells.
Journal ArticleDOI
The emergence of perovskite solar cells
TL;DR: In this article, a review describes the rapid progress that has been made in hybrid organic-inorganic perovskite solar cells and their applications in the photovoltaic sector.
Journal ArticleDOI
Electron-hole diffusion lengths > 175 μm in solution-grown CH3NH3PbI3 single crystals
TL;DR: It is found that the diffusion lengths in CH3NH3PbI3 single crystals grown by a solution-growth method can exceed 175 micrometers under 1 sun (100 mW cm−2) illumination and exceed 3 millimeters under weak light for both electrons and holes.