نتایج جستجو برای: charge carrier

تعداد نتایج: 208985  

Journal: :Physical chemistry chemical physics : PCCP 2018
Fabian Sieland Jenny Schneider Detlef W Bahnemann

The effects of the particle size distribution on the charge carrier dynamics and the photocatalytic activity of mixed titanium dioxide (TiO2) powder samples were investigated in this work. Instead of the synthesis of the small semiconductor particles, the binary particle size distributions of the powders were obtained by mixing commercially available TiO2 powders with different particle sizes. ...

Journal: :Chemical communications 2015
Ahmad M Mohamed Amina S Aljaber Siham Y AlQaradawi Nageh K Allam

We demonstrate, for the first time, the synthesis of titania nanotubes with ultrathin (3-5 nm) wall thickness. As revealed by the incident photon-to-current collection efficiency (IPCE) and electrochemical impedance spectroscopy measurements, the ultrathin walls, less than the charge carrier diffusion length, were essential to ensure fast and efficient charge carrier collection.

2017
Eline M. Hutter Rebecca J. Sutton Sanjana Chandrashekar Mojtaba Abdi-Jalebi Samuel D. Stranks Henry J. Snaith Tom J. Savenije

Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolv...

Journal: :Ukrainian Journal of Physics 2019

2017
Jeongkyun Roh Taesoo Lee Chan-mo Kang Jeonghun Kwak Philippe Lang Gilles Horowitz Hyeok Kim Changhee Lee

We demonstrated modulation of charge carrier densities in all-solution-processed organic field-effect transistors (OFETs) by modifying the injection properties with self-assembled monolayers (SAMs). The all-solution-processed OFETs based on an n-type polymer with inkjet-printed Ag electrodes were fabricated as a test platform, and the injection properties were modified by the SAMs. Two types of...

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