Heterointerface control of organic semiconductor devices

有机半导体器件的异质界面控制

• 批准号: EP/G060738/1
• 负责人: Richard Friend
• 金额: $ 852.9万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FG060738%2F1
• 关键词: Heterointerface; control; organic; semiconductor; devices

Organic electronic materials are widely used in LEDs, transistors and, though less advanced, in solar cells. Organic semiconductor devices are generally divided into two classes: those made by vacuum deposition of so-called 'small molecules' and those made by solution-processing of film-forming materials (typically polymers). The UK community, following some of the early work at Cambridge has tended to concentrate on the latter class of materials. The rationale for this is two-fold. Firstly, in terms of translation to large-scale manufacture, direct low-temperature solution processing of active semiconductors is very attractive for low-cost processing, particularly where patterning can be carried out by direct printing (ink-jet printing has been developed, for example, for deposition of red-, green- and blue-emitting materials in full colour displays). Secondly, solution processing presents challenges and opportunities for the formation of useful device structures. In some respects it is awkward - it is generally difficult to assemble multiple layers of organic semiconductor to make conventional laminar heterostructures because solvents are typically not sufficiently specific to allow successive layer depositions without disturbing lower layers - but in other respects, there are real opportunities to generate architectures that would be very difficult to make conventionally. For example, interpenetrating networks of electron-accepting and hole-accepting polymers are required for photovoltaic devices, so that light absorbed throughout the thickness of the semiconductor layer can generated excitons close enough to a region of heterojunction to generate separated charges. The rapid progress made over the last 10 years has taken the field to a level where device performance already sustains a fledgling industry. Basic understanding of the electronic structure of organic heterointerfaces both underpins this industry, and also presents us with a new landscape for discovery where we need to achieve a new level of control over molecular and nanoscale structure. Limitations in current device performance, for LEDs, PVs and FETs, are determined by limitations in our ability to control and measure structures at heterointerfaces. The vision of the present project is to achieve a step-change improvement in the control of molecular and nanoscale structure at organic heterointerfaces and thus to bring about a step-change in electronic functionality and performance of active semiconductor devices including LEDs, FETs and photovoltaics .The mining of this rich new seam of science will deliver game-changing discoveries for both science and engineering. The programme encompasses a variety of different interfaces, between organic-organic and organic-inorganic semiconductors; organic semiconductors and dielectrics; and organic semiconductor-electrode interfaces.

有机电子材料被广泛用于LED，晶体管，虽然不太先进，但在太阳能电池中。有机半导体设备通常分为两类：通过真空沉积所谓的“小分子”制成的设备，以及通过溶液处理膜形成材料（通常是聚合物）进行的。在剑桥的一些早期工作之后，英国社区倾向于专注于后一种材料。这样的理由是两个方面。首先，就转化为大规模制造而言，主动半导体的直接低温溶液处理对低成本处理非常有吸引力，尤其是在直接打印中可以进行图案（例如，已经开发出墨水喷射打印（例如，用于沉积红色，绿色，绿色和蓝色的材料中的完整颜色中的材料））。其次，解决方案处理给形成有用的设备结构带来了挑战和机会。在某些方面，这很尴尬 - 通常很难组装多层有机半导体来制造传统的层状异质结构，因为通常不足以具体地特异性以允许连续的层沉积而不会干扰下层而不会干扰其他方面，但是在其他方面，有很难产生很难制作常规的建筑。例如，光伏设备需要电子感受和孔吸收聚合物的互穿网络，因此，在半导体层的整个厚度中吸收的光可以产生足够接近异质结的区域以产生异质结的区域以产生分离的电荷。在过去的十年中，迅速的进步使该领域达到了设备性能已经维持刚起步的行业的水平。对有机异源的电子结构的基本了解既是该行业的基础，又为我们提供了新的发现景观，在这些景观中，我们需要实现对分子和纳米级结构的新水平。对于LED，PVS和FET的当前设备性能的局限性取决于我们控制和测量异性框架结构的能力的限制。本项目的愿景是在有机异源方面对分子和纳米级结构的控制进行逐步改变，从而实现电子功能的逐步变化，以及活跃的半导体设备的性能，包括LED，FETS，FETS，FETS和PHOTOVOLTAICS。这款丰富的Science Science的挖掘都将提供游戏 - 融合游戏的新型Science和Inscormenties。该程序涵盖了有机有机和有机无机半导体之间的各种不同界面；有机半导体和电介质；和有机半导体 - 电极接口。

项目成果

Impact of monovalent cation halide additives on the structural and optoelectronic properties of CH3NH3PbI3 perovskite

一价阳离子卤化物添加剂对CH3NH3PbI3钙钛矿结构和光电性能的影响

• DOI: 10.17863/cam.719
• 发表时间: 2016
• 作者: Abdi-Jalebi M

Spin signatures of exchange-coupled triplet pairs formed by singlet fission

• DOI: 10.1103/physrevb.94.045204
• 发表时间: 2016-07-11
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: Bayliss, Sam L.;Weiss, Leah R.;Greenham, Neil C.
• 通讯作者: Greenham, Neil C.

Role of PbSe Structural Stabilization in Photovoltaic Cells

• DOI: 10.1002/adfm.201401816
• 发表时间: 2015-02-11
• 期刊: ADVANCED FUNCTIONAL MATERIALS
• 影响因子: 19
• 作者: Asil, Demet;Walker, Brian J.;Friend, Richard H.
• 通讯作者: Friend, Richard H.

Field-enhanced recombination at low temperatures in an organic photovoltaic blend

有机光伏混合物中的低温场增强复合

• DOI: 10.1103/physrevb.92.125301
• 发表时间: 2015
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Athanasopoulos S

Excimer Formation by Steric Twisting in Carbazole and Triphenylamine-Based Host Materials

• DOI: 10.1021/jp512772j
• 发表时间: 2015-02-05
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY C
• 影响因子: 3.7
• 作者: Bagnich, Sergey A.;Athanasopoulos, Stavros;Koehler, Anna
• 通讯作者: Koehler, Anna