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.

有机电子材料广泛应用于 LED、晶体管以及太阳能电池（尽管不太先进）。有机半导体器件通常分为两类：通过真空沉积所谓的“小分子”制成的器件和通过成膜材料（通常是聚合物）的溶液处理制成的器件。英国社区继剑桥大学的一些早期工作之后，倾向于专注于后一类材料。这样做的理由有两个。首先，就大规模制造而言，有源半导体的直接低温溶液加工对于低成本加工非常有吸引力，特别是可以通过直接印刷进行图案化的情况（喷墨印刷已经开发出来，例如用于在全彩显示器中沉积红色、绿色和蓝色发光材料）。其次，溶液加工为有用器件结构的形成带来了挑战和机遇。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，因为溶剂通常没有足够的特异性，无法在不干扰下层的情况下进行连续的层沉积——但在其他方面，确实有机会生成传统方法很难制造的结构。例如，光伏器件需要电子接受和空穴接受聚合物的互穿网络，使得整个半导体层厚度吸收的光可以产生足够接近异质结区域的激子以产生分离的电荷。过去 10 年取得的快速进步使该领域达到了设备性能已经足以支撑新兴行业的水平。对有机异质界面电子结构的基本了解既支撑了这个行业，也为我们提供了一个新的发现领域，我们需要实现对分子和纳米级结构的新水平的控制。 LED、PV 和 FET 的当前器件性能的限制是由我们控制和测量异质界面结构的能力的限制决定的。本项目的愿景是实现有机异质界面分子和纳米级结构控制的阶跃式改进，从而实现包括 LED、FET 和光伏器件在内的有源半导体器件的电子功能和性能的阶跃变化。对这一丰富的新科学矿层的挖掘将为科学和工程带来改变游戏规则的发现。该计划涵盖有机-有机和有机-无机半导体之间的各种不同的界面；有机半导体和电介质；和有机半导体电极界面。

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