نتایج جستجو برای: electron injection

تعداد نتایج: 459943  

Journal: :Chemical communications 2016
Satoshi Makuta Maning Liu Masaru Endo Hidetaka Nishimura Atsushi Wakamiya Yasuhiro Tachibana

Photo-excitation intensity dependent electron and hole injections from CH3NH3PbI3 perovskite to nanocrystalline TiO2 and spiro-OMeTAD are presented with the electron injection yield decrease from 95% to 10% and the hole injection yield decrease from 99% to 50% by increasing the excitation intensity from 10 nJ cm(-2) to 50 μJ cm(-2).

Journal: :Physical review letters 2011
J S Jiang J E Pearson S D Bader

Using ballistic-electron-emission spectroscopy (BEES), we directly determined the energy barrier for electron injection at clean interfaces of Alq(3) with Al and Fe to be 2.1 and 2.2 eV, respectively. We quantitatively modeled the sub-barrier BEES spectra with an accumulated space charge layer, and found that the transport of nonballistic electrons is consistent with random hopping over the inj...

The dye-sensitized solar cells (DSSC) have been regarded as one of the most promising new generation solar cells. Tremendous research efforts have been invested to improve the efficiency of solar energy conversion which is generally determined by the light harvesting efficiency, electron injection efficiency and undesirable electron lifetime. In this review, various characteristics of dye-...

Journal: :The journal of physical chemistry letters 2015
Adriano Monti Christian F A Negre Victor S Batista Luis G C Rego Huub J M de Groot Francesco Buda

We investigate the electron injection from a terrylene-based chromophore to the TiO2 semiconductor bridged by a recently proposed phenyl-amide-phenyl molecular rectifier. The mechanism of electron transfer is studied by means of quantum dynamics simulations using an extended Hückel Hamiltonian. It is found that the inclusion of the nuclear motion is necessary to observe the photoinduced electro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

2012
Tien-Lung Chiu Pei-Yu Lee

In this paper, we investigate the carrier injection and transport characteristics in iridium(III)bis[4,6-(di-fluorophenyl)-pyridinato-N,C2']picolinate (FIrpic) doped phosphorescent organic light-emitting devices (OLEDs) with oxadiazole (OXD) as the bipolar host material of the emitting layer (EML). When doping Firpic inside the OXD, the driving voltage of OLEDs greatly decreases because FIrpic ...

Journal: :Scientific reports 2016
Chanseok Kim Jae-Wook Choi Sungjin Choi Soomin Kim Hyomin Park Hee-eun Song Sam S Yoon Joo-Youl Huh Yoonmook Kang Hae-Seok Lee Donghwan Kim

A high contact resistance for screen-printed contacts was observed when a conventional Ag paste was used on a boron emitter. The results of this study suggest that electron injection during firing is one of the processes that contribute to a lower contact resistance. Larger quantities of Ag precipitates formed upon electron injection into the boron emitter, which was confirmed by observing Ag c...

Journal: :Physical review letters 2010
Takanobu Amano Masahiro Hoshino

Electron acceleration in collisionless shocks with arbitrary magnetic field orientations is discussed. It is shown that the injection of thermal electrons into the diffusive shock acceleration process is achieved by an electron beam with a loss cone in velocity space that is reflected back upstream from the shock through the shock drift acceleration mechanism. The electron beam is able to excit...

Journal: :Optics express 2014
Bing-Chen Lin Kuo-Ju Chen Chao-Hsun Wang Ching-Hsueh Chiu Yu-Pin Lan Chien-Chung Lin Po-Tsung Lee Min-Hsiung Shih Yen-Kuang Kuo Hao-Chung Kuo

A tapered AlGaN electron blocking layer with step-graded aluminum composition is analyzed in nitride-based blue light-emitting diode (LED) numerically and experimentally. The energy band diagrams, electrostatic fields, carrier concentration, electron current density profiles, and hole transmitting probability are investigated. The simulation results demonstrated that such tapered structure can ...

Bahman Rashidi, Jafar Soleimani Rad Leila Roshangar Rafie Alizadeh Miran4

Objective(s) Sildenafil citrate is a new drug and has special properties that bring about nitric oxide effects on vascular smooth muscle. The aim of this study was to assess the effects of ovarian stimulation and sildenafil citrate injection on pinopode expression in mice. Materials and Methods Thirty adult female mice were randomly divided into three groups: control, hyperstimulated and hyp...

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