scholarly journals Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals

Science ◽  
2015 ◽  
Vol 347 (6221) ◽  
pp. 519-522 ◽  
Author(s):  
D. Shi ◽  
V. Adinolfi ◽  
R. Comin ◽  
M. Yuan ◽  
E. Alarousu ◽  
...  
Keyword(s):  
Single Crystals ◽  
State Density ◽  
Trap State ◽  
Carrier Diffusion

scholarly journals Ultrahigh sensitivity of methylammonium lead tribromide perovskite single crystals to environmental gases

2016 ◽  
Vol 2 (7) ◽  
pp. e1600534 ◽  
Author(s):  
Hong-Hua Fang ◽  
Sampson Adjokatse ◽  
Haotong Wei ◽  
Jie Yang ◽  
Graeme R. Blake ◽  
...  
Keyword(s):  
Single Crystals ◽  
Surface Recombination ◽  
State Density ◽  
Limiting Factors ◽  
Surface Recombination Velocity ◽  
Photoluminescence Intensity ◽  
Trap State ◽  
Surface Trap ◽  
Design And Optimization ◽  
Surface Recombination Rate

One of the limiting factors to high device performance in photovoltaics is the presence of surface traps. Hence, the understanding and control of carrier recombination at the surface of organic-inorganic hybrid perovskite is critical for the design and optimization of devices with this material as the active layer. We demonstrate that the surface recombination rate (or surface trap state density) in methylammonium lead tribromide (MAPbBr3) single crystals can be fully and reversibly controlled by the physisorption of oxygen and water molecules, leading to a modulation of the photoluminescence intensity by over two orders of magnitude. We report an unusually low surface recombination velocity of 4 cm/s (corresponding to a surface trap state density of 108cm−2) in this material, which is the lowest value ever reported for hybrid perovskites. In addition, a consistent modulation of the transport properties in single crystal devices is evidenced. Our findings highlight the importance of environmental conditions on the investigation and fabrication of high-quality, perovskite-based devices and offer a new potential application of these materials to detect oxygen and water vapor.

scholarly journals Nanoscale control of grain boundary potential barrier, dopant density and filled trap state density for higher efficiency perovskite solar cells

InfoMat ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 409-423 ◽  
Author(s):  
Behzad Bahrami ◽  
Sally Mabrouk ◽  
Nirmal Adhikari ◽  
Hytham Elbohy ◽  
Ashim Gurung ◽  
...  
Keyword(s):  
Solar Cells ◽  
Grain Boundary ◽  
Potential Barrier ◽  
Perovskite Solar Cells ◽  
State Density ◽  
Trap State ◽  
Boundary Potential

Limits of Carrier Diffusion in n-Type and p-Type CH3NH3PbI3 Perovskite Single Crystals

2016 ◽  
Vol 7 (17) ◽  
pp. 3510-3518 ◽  
Author(s):  
Octavi E. Semonin ◽  
Giselle A. Elbaz ◽  
Daniel B. Straus ◽  
Trevor D. Hull ◽  
Daniel W. Paley ◽  
...  
Keyword(s):  
Single Crystals ◽  
Carrier Diffusion ◽  
P Type

scholarly journals An Environmentally Stable Organic–Inorganic Hybrid Perovskite Containing Py Cation with Low Trap-State Density

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 272
Author(s):  
Alex Fan Xu ◽  
Ryan Taoran Wang ◽  
Lory Wenjuan Yang ◽  
Elton Enchong Liu ◽  
Gu Xu
Keyword(s):  
State Density ◽  
Hexagonal Structure ◽  
Environmental Stability ◽  
Trap State ◽  
X Ray Diffraction ◽  
Lead Iodide ◽  
Casting Method ◽  
Hybrid Perovskite ◽  
Stable Hybrid ◽  
Space Charge Limited Currents

The commonly-employed methylammonium-based perovskites are environmentally unstable, which limits their commercialization. To resolve this problem, a stable hybrid perovskite, pyrrolidinium lead iodide (PyPbI3), was synthesized successfully via a simple drop casting method. The formed PyPbI3 exhibited a hexagonal structure. It presented not only excellent phase stability, but also low trap-state density, as confirmed via the X-ray diffraction and space-charge-limited currents measurements. This novel perovskite may be applicable to perovskite photovoltaics to improve their environmental stability.

A New Method to Estimate Grain Boundary Trap State Density in Poly-Si TFTs

1991 ◽  
Vol 30 (Part 1, No. 12B) ◽  
pp. 3715-3718 ◽  
Author(s):  
Noriji Kato ◽  
So Yamada ◽  
Yoshio Nishihara ◽  
Mario Fuse ◽  
Toshihisa Hamano
Keyword(s):  
Grain Boundary ◽  
State Density ◽  
New Method ◽  
Trap State

scholarly journals Correction to “Limits of Carrier Diffusion in n-Type and p-Type CH3NH3PbI3 Perovskite Single Crystals”

2017 ◽  
Vol 8 (24) ◽  
pp. 6092-6093
Author(s):  
Octavi E. Semonin ◽  
Giselle A. Elbaz ◽  
Daniel B. Straus ◽  
Trevor D. Hull ◽  
Daniel W. Paley ◽  
...  
Keyword(s):  
Single Crystals ◽  
Carrier Diffusion ◽  
P Type

Variation of trap state density and barrier height with Cu/In ratio in CuInSe2 films

1994 ◽  
Vol 247 (1) ◽  
pp. 8-14 ◽  
Author(s):  
R. Pal ◽  
K.K. Chattopadhyay ◽  
S. Chaudhuri ◽  
A.K. Pal
Keyword(s):  
Barrier Height ◽  
State Density ◽  
Trap State

Measurements of Grain Boundary Trap Density and Hydrogen Diffusivity in Polycrystalline Silicon Fet's

1990 ◽  
Vol 182 ◽  
Author(s):  
Chad B. Moore ◽  
Dieter G. Ast
Keyword(s):  
Grain Boundary ◽  
Polycrystalline Silicon ◽  
Hydrogen Diffusion ◽  
State Density ◽  
Trap Density ◽  
Hydrogen Diffusivity ◽  
Trap State ◽  
Polycrystalline Silicon Films ◽  
Hydrogenation Time ◽  
Deposited Films

AbstractHydrogen diffusion in as-deposited and in oxidation-annealed polycrystalline silicon films was investigated using n-type accumulation-mode MOSFET's. The diffusion was studied by measuring the reduction in the grain boundary trap density with hydrogenation time. The number of traps in fully hydrogenated as-deposited films fell to about 45% of the initial trap state density and fell to about 20% in the oxidized-annealed films. Concurrently, the mobility increased about 95 % to 5cm2/Vs in the as-deposited films and by about 55 % to 25 cm2/Vs in the oxidized polysilicon devices. The effective preexponential diffusion coefficient and activation energy for hydrogen diffusion in the two different films were Do= 5.4×10−10 cm2/s and EA= 0.37 eV for the as-deposited polysilicon and Do=2.1×10−10 cm2/s and EA= 0.36 eV for the oxidized polysilicon.

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