Помощь      Поиск      Участники      Календарь      Новости
 Учебные Материалы      ВАЛтест     Фотогалерея Фотогалерея
 Правила форума      Виртуальные тренажеры      Мемуары


  Reply to this topicStart new topicStart Poll

> (2014) Trap-Free Transport in Ordered and, Disordered TiO2 Nanostructures
VAL
Дата 17.02.2020 12:15
Quote Post
Offline



Мэтр, проФАН любви... proFAN of love
*****

Профиль
Группа: Администраторы
Сообщений: 37820
Пользователь №: 1
Регистрация: 6.03.2004





(2014) Trap-Free Transport in Ordered and Disordered TiO2 Nanostructures
Источники6
- https://pubs.acs.org/doi/10.1021/nl4046087
- https://pubs.acs.org/doi/suppl/10.1021/nl40...6087_si_001.pdf - скачать
- Nano Lett. 2014, 14, 5, 2305-2309

Авторы: Julio Villanueva-CabSong-Rim JangAdam F. HalversonKai ZhuArthur J. Frank*

doi: 10.1021/nl4046087

QUOTE
Abstract
Abstract Image

Understanding the influence of different film structures on electron diffusion in nanoporous metal oxide films has been challenging. Because of the rate-limiting role that traps play in controlling the transport properties, the structural effects of different film architectures are largely obscured or reduced. We describe a general approach to probe the impact of structural order and disorder on the charge-carrier dynamics without the interference of transport-limiting traps. As an illustration of this approach, we explore the consequences of trap-free diffusion in vertically aligned nanotube structures and random nanoparticle networks in sensitized titanium dioxide solar cells. Values of the electron diffusion coefficients in the nanotubes approached those observed for the single crystal and were up to 2 orders of magnitude greater than those measured for nanoparticle films with various average crystallites sizes. Transport measurements together with modeling show that electron scattering at grain boundaries in particle networks limits trap-free diffusion. In presence of traps, transport was 103–105 times slower in nanoparticle films than in the single crystal. Understanding the link between structure and carrier dynamics is important for systematically altering and eventually controlling the electronic properties of nanoscaled materials.


QUOTE


Присоединённое изображение
Присоединённое изображение


--------------------
www.valinfo.ru
Всегда... Always....
Quod licet jovi, non licet bovi!
PMEmail PosterUsers Website
Top
VAL
Дата 28.02.2020 15:18
Quote Post
Offline



Мэтр, проФАН любви... proFAN of love
*****

Профиль
Группа: Администраторы
Сообщений: 37820
Пользователь №: 1
Регистрация: 6.03.2004





:doh:


--------------------
www.valinfo.ru
Всегда... Always....
Quod licet jovi, non licet bovi!
PMEmail PosterUsers Website
Top
0 Пользователей читают эту тему (0 Гостей и 0 Скрытых Пользователей)
0 Пользователей:

Topic Options Reply to this topicStart new topicStart Poll