Inkjet-printed Filter-less narrowband colloidal Quantum Dot photodetectors and image sensors (IFQD)

喷墨印刷无滤光片窄带胶体量子点光电探测器和图像传感器 (IFQD)

• 批准号: 2728029
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2728029
• 关键词: Inkjet; printed; Filter; less; narrowband

In the foreseeable future, 'eye-like' or 'skin-like' soft image sensors are expected to play essential roles in our daily life. However, current image sensing electronics are not readily suited for the large flexible surfaces required for human-oriented applications because they are made of rigid panchromatic silicon (CCD) or compound semiconductor photodetectors (CMOS) and integrated with an array of optical filters for colour discrimination. The use of colour filters also limits the foldability and pixels density of the detector array. Colloidal quantum dots (QDs) have shown excellent substrate-agnostic flexibility and detectivity. However, their broad light absorption means filters need to be added to make them specific to a certain colour of light. So far, the most successful filter-less model is based on charge collection narrowing (CCN) photodiodes, which are semiconductor devices that convert the specific colour of light into an electrical current. However, since the narrowband response is delivered by controlling photogenerated charge collection efficiency, micrometres thickness junction is often required, which results in an array with a greater likelihood of interpixel cross-talk and frequency bandwidth limitations. This IFQD PhD studentship is designed as a comprehensive study on using non-toxic QDs (zinc selenide telluride sulphide (ZnSeTeS), and indium gallium phosphide (InGaP) to efficiently detect light within a specific wavelength of interest at thicknesses as little as a few hundred nanometres. In addition, we will use high reflectivity cavities (e.g. enhance light absorption) to reduce the junction thickness and use an inkjet printer for CCN photodetectors microfabrication and multiple pixel image sensor integrations.

在可预见的未来，“眼睛”或“皮肤”软图像传感器预计将在我们的日常生活中发挥重要作用。然而，当前的图像感测电子器件不容易适合于面向人类的应用所需的大的柔性表面，因为它们由刚性全色硅（CCD）或化合物半导体光电探测器（CMOS）制成，并且与用于颜色辨别的滤光器阵列集成。滤色器的使用还限制了检测器阵列的可折叠性和像素密度。胶体量子点（QD）已经显示出优异的衬底不可知的灵活性和探测性。然而，它们广泛的光吸收意味着需要添加滤光片，使它们特定于某种颜色的光。到目前为止，最成功的无滤波器模型是基于电荷收集窄化（CCN）光电二极管，这是一种将特定颜色的光转换为电流的半导体器件。然而，由于窄带响应是通过控制光生电荷收集效率来传递的，因此通常需要微米厚度的结，这导致阵列具有更大的像素间串扰和频率带宽限制的可能性。该IFQD博士研究生项目旨在使用无毒QD（硒化碲化锌硫化物（ZnSeTeS）和磷化铟镓（InGaP））进行全面研究，以有效检测厚度小至几百纳米的特定波长内的光。此外，我们将使用高反射率腔（例如增强光吸收）来减小结厚度，并使用喷墨打印机进行CCN光电探测器微加工和多像素图像传感器集成。