EAGER: Scalable Organic Shortwave Infrared Photodiodes

EAGER:可扩展有机短波红外光电二极管

基本信息

  • 批准号:
    1839361
  • 负责人:
  • 金额:
    $ 15万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-08-01 至 2021-01-31
  • 项目状态:
    已结题

项目摘要

Photodetectors responsive to shortwave infrared (SWIR) light are critical to a wide range of spectroscopic systems and optoelectronics that form the foundation for scientific, industrial, medical, and defense applications. SWIR technologies remain largely dependent on inorganic crystals, which require complex manufacturing processes that are cost-prohibitive and not affordable for widespread use. New alternative materials are highly sought after, especially the ones that allow direct deposition to replace complex manufacturing processes. Organic semiconductors allow direct deposition from solutions and enable scalability but so far are limited to the visible and near-infrared spectrum. This project will investigate a promising class of novel SWIR polymeric photodiodes to reveal the fundamental properties necessary for extending the utility of organics into the SWIR spectrum currently dominated by inorganic materials. If successful, the proposed research will offer a transformative capability to realize widely deployable SWIR systems that are not achievable with conventional semiconductors and will potentially revolutionize a wide variety of applications that rely on SWIR sensing. This project provides graduate and undergraduate students opportunities for exchange visits and internships with an industrial partner. The team will showcase research results in outreach activities, which include hands-on workshops for high-school students and teachers from under-served schools and summer research programs for students from community colleges.The project goal is to find the fundamental limits on the spectral range and detectivity of organic bulk heterojunction photodiodes for detecting shortwave infrared light. This project will study structure-processing-property relationships and unveil the essential characteristics for effective photocurrent generation from low-energy charge-transfer (CT) states. Specifically, this study will measure the device photoresponse and dark current to quantify the extent of spectral range and noise increase with bandgap reduction. In Task 1, the objective is to examine if CT exciton dissociation will become efficient with high permittivity materials, because large permittivity presents a highly polarizable environment that will reduce the Coulombic attraction between the electron-hole pair and thus facilitate dissociation. The permittivity of the bulk heterojunction will be adjusted by blending in high-k camphoric molecules and by using fullerene derivatives with ethylene glycol units in solubilizing side-chains. The dissociation efficiency will be obtained from transient photoconductivity measurements in relation to a material?s permittivity. More effective dissociation will enable photocurrent generation from low CT-state bandgaps and extend spectral range. In Task 2, the objective is to determine the minimum CT-state energy that still allows exciton dissociation before recombination dominates, to understand and predict spectral range. The same SWIR polymer will be paired with various fullerene derivatives to systematically lower CT-state bandgaps and thus increase spectral range. As the CT-state bandgap is significantly reduced, more thermal generation-recombination events will likely lead to an increase in dark current noise. The charge recombination lifetime will be measured via impedance spectroscopy to examine the balance between spectral range and noise. The resulting knowledge will provide better understandings of the photogeneration requirements for future development of organic infrared photodetectors.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
响应短波红外(SWIR)光的光电探测器对于广泛的光谱系统和光电子学至关重要,这些系统和光电子学构成了科学,工业,医疗和国防应用的基础。SWIR技术在很大程度上仍然依赖于无机晶体,这需要复杂的制造工艺,成本高昂,无法广泛使用。新的替代材料受到高度追捧,特别是那些允许直接沉积取代复杂制造工艺的材料。有机半导体允许从溶液中直接沉积,并具有可扩展性,但到目前为止仅限于可见光和近红外光谱。该项目将研究一类有前途的新型SWIR聚合物光电二极管,以揭示将有机物的应用扩展到目前由无机材料主导的SWIR光谱所必需的基本特性。如果成功,该研究将提供一种变革性的能力,以实现广泛部署的SWIR系统,这是传统半导体无法实现的,并将潜在地彻底改变依赖SWIR传感的各种应用。该项目为研究生和本科生提供了与工业合作伙伴交流访问和实习的机会。该团队将在推广活动中展示研究成果,其中包括为服务不足学校的高中生和教师举办的实践研讨会,以及为社区大学学生举办的暑期研究项目。该项目的目标是找出用于探测短波红外光的有机体异质结光电二极管的光谱范围和探测能力的基本限制。本项目将研究结构-加工-性质关系,揭示低能电荷转移(CT)状态产生有效光电流的基本特征。具体而言,本研究将测量器件的光响应和暗电流,以量化光谱范围和噪声随带隙减小而增加的程度。在任务1中,目标是检验CT激子解离是否会在高介电常数材料中变得有效,因为大介电常数呈现出高度极化的环境,这将减少电子-空穴对之间的库仑吸引力,从而促进解离。通过在高钾樟脑分子中混合和在增溶侧链中使用带有乙二醇单元的富勒烯衍生物,可以调节体异质结的介电常数。解离效率将从与材料有关的瞬态光电导率测量中获得。介电常数。更有效的解离将使光电流产生低ct状态带隙和扩大光谱范围。在任务2中,目标是确定在重组占主导地位之前仍然允许激子解离的最小ct态能量,以了解和预测光谱范围。相同的SWIR聚合物将与各种富勒烯衍生物配对,以系统地降低ct态带隙,从而增加光谱范围。随着ct态带隙的显著减小,更多的热生成-复合事件将可能导致暗电流噪声的增加。电荷复合寿命将通过阻抗谱测量,以检查光谱范围和噪声之间的平衡。所得到的知识将为未来有机红外探测器的发展提供更好的光发生要求的理解。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Organic Bulk Heterojunction Infrared Photodiodes for Imaging Out to 1300 nm
  • DOI:
    10.1021/acsaelm.9b00009
  • 发表时间:
    2019-04
  • 期刊:
  • 影响因子:
    4.7
  • 作者:
    W. Yao;Zhenghui Wu;Eric Huang;Lifeng Huang;A. E. London;Zhaowei Liu;J. Azoulay;T. Ng
  • 通讯作者:
    W. Yao;Zhenghui Wu;Eric Huang;Lifeng Huang;A. E. London;Zhaowei Liu;J. Azoulay;T. Ng
Noise and detectivity limits in organic shortwave infrared photodiodes with low disorder
低无序有机短波红外光电二极管的噪声和探测率限制
  • DOI:
    10.1038/s41528-020-0069-x
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    14.6
  • 作者:
    Wu, Zhenghui;Li, Ning;Eedugurala, Naresh;Azoulay, Jason D.;Leem, Dong-Seok;Ng, Tse Nga
  • 通讯作者:
    Ng, Tse Nga
Solution-Processed Phototransistors Combining Organic Absorber and Charge Transporting Oxide for Visible to Infrared Light Detection
  • DOI:
    10.1021/acsami.9b08622
  • 发表时间:
    2019-10-09
  • 期刊:
  • 影响因子:
    9.5
  • 作者:
    Kim, Hyonwoong;Wu, Zhenghui;Ng, Tse Nga
  • 通讯作者:
    Ng, Tse Nga
Tuning the charge blocking layer to enhance photomultiplication in organic shortwave infrared photodetectors
  • DOI:
    10.1039/d0tc03013a
  • 发表时间:
    2020-11-21
  • 期刊:
  • 影响因子:
    6.4
  • 作者:
    Li, Ning;Lim, Jasmine;Ng, Tse Nga
  • 通讯作者:
    Ng, Tse Nga
The Role of Dielectric Screening in Organic Shortwave Infrared Photodiodes for Spectroscopic Image Sensing
  • DOI:
    10.1002/adfm.201805738
  • 发表时间:
    2018-12-12
  • 期刊:
  • 影响因子:
    19
  • 作者:
    Wu, Zhenghui;Zhai, Yichen;Ng, Tse Nga
  • 通讯作者:
    Ng, Tse Nga
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Tse Nga Ng其他文献

Organic inkjet-patterned memory array based on ferroelectric field-effect transistors
  • DOI:
    10.1016/j.orgel.2011.08.019
  • 发表时间:
    2011-12-01
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    Tse Nga Ng;Russo, Beverly;Arias, Ana Claudia
  • 通讯作者:
    Arias, Ana Claudia
Integrated devices that can recognize hand gestures
能够识别手势的集成设备
  • DOI:
    10.1038/s41928-023-01003-0
  • 发表时间:
    2023-08-10
  • 期刊:
  • 影响因子:
    40.900
  • 作者:
    Chanho Shin;Tse Nga Ng
  • 通讯作者:
    Tse Nga Ng
Engineering electro-crystallization orientation and surface activation in wide-temperature zinc ion supercapacitors
宽温锌离子超级电容器中工程化电结晶取向和表面活化
  • DOI:
    10.1038/s41467-025-58857-5
  • 发表时间:
    2025-04-16
  • 期刊:
  • 影响因子:
    15.700
  • 作者:
    Lulu Yao;Nandu Koripally;Chanho Shin;Anthony Mu;Zheng Chen;Kaiping Wang;Tse Nga Ng
  • 通讯作者:
    Tse Nga Ng

Tse Nga Ng的其他文献

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{{ truncateString('Tse Nga Ng', 18)}}的其他基金

CMOS+X: Retinomorphic Infrared Imager with Sparsity-adaptive Machine-Learning Accelerator
CMOS X:具有稀疏自适应机器学习加速器的视网膜成像红外成像仪
  • 批准号:
    2318990
  • 财政年份:
    2023
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
Collaborative Research: DMREF: Organic Materials Architectured for Researching Vibronic Excitations with Light in the Infrared (MARVEL-IR)
合作研究:DMREF:用于研究红外光振动激发的有机材料 (MARVEL-IR)
  • 批准号:
    2323668
  • 财政年份:
    2023
  • 资助金额:
    $ 15万
  • 项目类别:
    Continuing Grant
Collaborative Research: GCR: Convergence on Phosphorus Sensing for Understanding Global Biogeochemistry and Enabling Pollution Management and Mitigation
合作研究:GCR:融合磷传感以了解全球生物地球化学并实现污染管理和缓解
  • 批准号:
    2317825
  • 财政年份:
    2023
  • 资助金额:
    $ 15万
  • 项目类别:
    Continuing Grant
Direct Chiro-Optical Detectors Based on Organic Semiconductors
基于有机半导体的直接手性光学探测器
  • 批准号:
    2222203
  • 财政年份:
    2022
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
PFI-TT: High-Energy Supercapacitors Based on Materials Stable Over Large Voltage Ranges
PFI-TT:基于在大电压范围内稳定的材料的高能超级电容器
  • 批准号:
    2120103
  • 财政年份:
    2021
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
MCA: Fabrication of Structural Organic Supercapacitors
MCA:结构有机超级电容器的制造
  • 批准号:
    2120701
  • 财政年份:
    2021
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
Biomechanical Models and Objective Metrics for Spasticity Rehabilitation
痉挛康复的生物力学模型和客观指标
  • 批准号:
    2054517
  • 财政年份:
    2021
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
Collaborative Research: Dual-droplet Electrohydrodynamic Printing of 2D Nanosheets
合作研究:二维纳米片的双液滴电流体动力打印
  • 批准号:
    1635729
  • 财政年份:
    2016
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant

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Scalable Learning and Optimization: High-dimensional Models and Online Decision-Making Strategies for Big Data Analysis
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