Scanning nano-OLED Probe

0523986Shtein近场扫描光学显微镜（NSOM）已经证明了亚波长的空间分辨率，并已应用于广泛的系统。然而，在纯光学NSOM技术中，照明几何形状、尖端吸收损失和光漂白的组合导致低信噪比、严重的尖端加热、样品降解和不可预测的响应。需要一种不同的本地化的，按需的光子产生的手段，以进一步提高measurement.The拟议的研究解决这些挑战，通过研究纳米尺度的限制的影响，在有机半导体中的电荷和激子。一个多功能的扫描纳米探针工具将被制造，包括一个电泵浦的有机发光二极管（OLED）内沉积的纳米级圆柱形腔的顶点的扫描探针悬臂梁。智力优势：拟议的纳米OLED探针将比迄今为止制造的可单独寻址的OLED小100倍，为研究影响其他纳米级器件性能的表面相互作用提供了一个强大的平台。这将导致更好地理解功能有机材料中电荷和能量传输的基本机制和标度律。这将反过来使大面积有机光电器件的性能特性得到改善。电泵浦探针的能力将允许研究敏感的生物材料、光子器件和材料。拟议的研究还将研究在高度受限的几何结构中分子传输的基本问题，以及在纳米制造中具有更广泛应用的有机沉积技术。更广泛的影响：作为一种新的NSOM技术，具有电泵浦和可调谐性，纳米OLED探针可以成为STM的光学等效物，从而实现新的应用，例如用于纳米级光学位存储元件和可调谐纳米传感器阵列的读写头。研究光和电荷载流子的限制，以及使用有机材料的纳米纤维，可以影响电泵浦有机激光器的发展，以及可调谐光源和传感器与纳米级电子电路的集成。纳米OLED探针将通过为纳米系统的研究提供新的仪器来加强研究和教育基础设施。通过其跨学科的性质，该项目将培养学生在有机电子和纳米制造的新兴领域。研究成果将被纳入至少两个部门的课程，促进教学和培训，这将使国家的最先进的纳米表征和处理工具的进一步和合作研究。

0523986ShteinNear-field Scanning Optical Microscopy (NSOM) has demonstrated sub-wavelength spatial resolution and has been applied to a broad range of systems. However, a combination of illumination geometry, absorption losses in the tip, and photobleaching in purely optical NSOM techniques results in low signal-to-noise ratios, severe tip heating, sample degradation, and unpredictable response. A different means of localized, on-demand photon generation is needed to further improve the measurement.The proposed research addresses these challenges by studying the effects of nanometer scale confinement of charges and excitons in organic semiconductors. A multifunctional scanning nano-probe tool will be fabricated, consisting of an electrically pumped organic light emitting diode (OLED) deposited inside of a nanoscale cylindrical cavity in the vertex of a scanning probe cantilever. Intellectual Merit: The proposed nano-OLED probe will be 100 times smaller than individually addressable OLEDs made to date, providing a powerful platform for investigating surface interactions that influence the performance of other nano-scale devices. This will result in greater understanding of the fundamental mechanisms and scaling laws of charge and energy transport in functional organic materials. This will in turn enable improvements in the performance characteristics of large-area organic optoelectronic devices. The ability to electrically pump the probe will allow the study of sensitive biological materials, photonic devices, and materials. The proposed research will also examine fundamental issues of molecular transport in highly confined geometries, as well as organic deposition techniques having broader applications in nano-fabrication. Broader Impact: As a new NSOM technique with electrical pumping and tunability, the nano-OLED probe can become the optical equivalent of STM, enabling new applications such as a read-write head for nanoscale optical bit storage elements and tunable nanosensor arrays. Studying the confinement of light and charge carriers, as well as nanofabrication using organic materials, can impact the development of electrically pumped organic lasers, and the integration of tunable light sources and sensors with nano-scale electronic circuits. The nano-OLED probe will enhance research and education infrastructure by providing novel instrumentation for the study of nanosystems. Through its interdisciplinary nature, this project will train students in the emerging fields of organic electronics and nano-fabrication. The research results will be integrated into the curricula of at least two departments, promoting teaching and training that will enable further and collaborative studies in the state-of-the-art nanoscale characterization and processing tools.