Collaborative Research: Perovskite Photodetectors with Microcavity Organic Light Emitting Diodes for Sensing Applications

合作研究：用于传感应用的具有微腔有机发光二极管的钙钛矿光电探测器

• 批准号: 1608610
• 负责人: Jinsong Huang
• 金额: $ 18.64万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1608610&HistoricalAwards=false
• 关键词: Collaborative; Research; Perovskite; Photodetectors; Microcavity

Abstract:Non-Technical:There is a growing need for small-size chemical and biological sensors to enable their integration into existing and developing technologies such as wearable electronics. The proposed research will address this need by developing such compact, sensitive, reliable, eventually user-friendly, inexpensive, flexible, and field-deployable sensors. In the long run the sensors will be adapted for applications such as medical testing, water and food quality monitoring, and security inspection. In addition to advancing the vital (bio) chemical sensing field, the project will benefit society by educating students in a diverse and highly interdisciplinary environment, producing highly qualified scientists/engineers who will contribute to this important multifaceted field, addressing key challenges in materials and device designs. The success of the project is expected to significantly advance the fields of thin film flexible electronics in conjunction with life-saving analytical applications.Technical:The specific goal of the proposed research is to advance the development of compact, sensitive, reliable, eventually user-friendly, inexpensive, flexible, and field-deployable, integrated photoluminescence (PL)-based chem/bio sensors, including in multiple analyte arrays. This objective addresses the growing need for continued miniaturization of sensors in applications such as medical testing, water and food quality monitoring, and security inspection. Moreover, such small-size sensors will enable their integration into existing and developing technologies, e.g., wearable electronics. To accomplish the objective of the proposed research fundamental science and engineering research is required. Thin film¡Vbased microcavity organic light emitting diodes (mcOLEDs) will be used as optical excitation sources; they will be integrated with hybrid, perovskite-based photodetectors (PDs). The mcOLEDs will be fabricated combinatorially on a single substrate, providing narrow emission bands (full width half max FWHM~20 nm). The emission peaks, produced by different active materials and microcavity dimensions, will range from the red to the near UV. The uniform dense array of such mcOLEDs, yet unachieved, will be integrated with two types of highly responsive perovskite PDs (an approach not yet explored): those responsive over a broad spectral range and those responsive over a narrow range. Bio/chem analytes will be monitored in two modes of operation, measuring analyte-induced changes in the (i) PL intensity using narrow-band PDs and (ii) PL decay time using both PD types. Developing both approaches will enhance selectivity and specificity. Importantly, to enable the advantageous PL monitoring where viable, the mcOLEDs and PDs will be evaluated and optimized to shorten the pulsed electroluminescence (EL) decay time and the PDs¡¦ response time by fundamental studies of their relation to materials, charge mobility, layer structures and thickness, defects, and device design. The integrated compact sensors will be demonstrated for two array types: (i) those operated by monitoring PL for, e.g., O2, dissolved O2, glucose, lactate, cholesterol, and ethanol, and (2) those operated largely by monitoring IPL as in e.g., pH measurement and immunoassays, which are of biological and health monitoring importance. The approaches outlined in this proposal will pave the way to miniaturized analytical tools on flexible substrates, integrated with microfluidic architectures. Array designs, attribute optimization, the demonstrated applications, and initial exploration of flexible devices are expected to significantly advance the fields of organic and hybrid electronics and analytical methodologies.

摘要：非技术：对小型化学和生物传感器的需求日益增长，以使其能够将其整合到现有的和开发的技术（例如可穿戴电子）中。拟议的研究将通过开发这种紧凑，敏感，可靠，有时用户友好，廉价，灵活且可采用的传感器来满足这一需求。从长远来看，传感器将适用于医疗测试，水和食物质量监测以及安全检查等应用。除了推进重要（BIO）化学敏感性领域外，该项目还将通过在多样性和高度跨学科的环境中教育学生来使社会受益，从而培养出高素质的科学家/工程师，这些科学家/工程师将为这个重要的多方面领域做出贡献，以应对材料和设备设计中的主要挑战。预计该项目的成功将显着推动薄膜柔性电子设备与挽救生命的分析应用的领域。技术：拟议研究的具体目标是促进紧凑，敏感，可靠，有时用户友好，有时用户友好，廉价，柔性，柔性和现场 - 可观的，可实地的，可实地的，可构成的光电量（PL）的发展（PL），以及bio inter/boio noters and/bio nio bio not/bio。这个目标地址是在医疗测试，水和食品质量监测以及安全检查等应用中持续微型化的传感器的需求日益增长。此外，这样的小型传感器将使它们能够集成到现有技术和开发技术，例如可穿戴电子产品。为了实现拟议的研究基础科学和工程研究的目标。薄膜的微腔有机光发射二极管（McOleds）将用作光学令人兴奋的来源；它们将与杂种，钙钛矿的光电探测器（PDS）集成。 MCOLEDS将在单个基材上组合制造，提供狭窄的发射带（全宽度最大FWHM〜20 nm）。由不同的活性材料和微腔尺寸产生的发射峰将从红色到接近紫外线的范围。此类McOLEDS的统一密集阵列（但未完成）将与两种高度响应的钙钛矿PDS（尚未探索的方法）集成：在广泛范围内的响应范围和在狭窄范围内的响应能力。生物/化学分析物将以两种操作模式进行监测，并使用窄带PDS测量分析物诱导的（I）PL强度的变化，以及（ii）使用两种PD类型的PL衰减时间。开发两种方法都将提高选择性和特异性。重要的是，要在可行的情况下进行有利的PL监测，将对McOLEDS和PDS进行评估并进行优化，以缩短脉冲电致发光（EL）衰减时间和PDS的响应时间，通过对材料的关系，电荷迁移率，层结构和厚度，缺陷，缺陷和设备设计的基本研究。将为两种阵列类型的综合传感器展示：（i）通过监视PL进行操作的那些，例如O2，O2，溶解的O2，葡萄糖，葡萄糖，胆固醇，胆固醇和乙醇，以及（2）那些通过在E.G. G. G.测量和免疫群中进行的IPL监视IPL的操作，这些量很大程度上具有生物和健康监测性，该pH测量和免疫原子均具有物质和健康监测。该提案中概述的方法将为与微流体体系结构集成的柔性底物上的小型分析工具铺平道路。阵列设计，属性优化，已显示的应用以及柔性设备的初始探索将显着推动有机和混合电子设备和分析方法的领域。