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Color-Selective Printed Organic Photodiodes for Filterless Multichannel Visible Light Communication

机译：彩色选择印刷有机光电二极管，用于无滤光片多通道可见光通信

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摘要

Future lightweight, flexible, and wearable electronics will employ visible-light-communication schemes to interact within indoor environments. Organic photodiodes are particularly well suited for such technologies as they enable chemically tailored optoelectronic performance and fabrication by printing techniques on thin and flexible substrates. However, previous methods have failed to address versatile functionality regarding wavelength selectivity without increasing fabrication complexity. This work introduces a general solution for printing wavelength-selective bulk-heterojunction photodetectors through engineering of the ink formulation. Nonfullerene acceptors are incorporated in a transparent polymer donor matrix to narrow and tune the response in the visible range without optical filters or light-management techniques. This approach effectively decouples the optical response from the viscoelastic ink properties, simplifying process development. A thorough morphological and spectroscopic investigation finds excellent charge-carrier dynamics enabling state-of-the-art responsivities >10(2) mA W-1 and cutoff frequencies >1.5 MHz. Finally, the color selectivity and high performance are demonstrated in a filterless visible-light-communication system capable of demultiplexing intermixed optical signals.
机译：未来的轻巧，灵活且可穿戴的电子产品将采用可见光通信方案在室内环境中进行交互。有机光电二极管特别适合此类技术，因为它们能够实现化学定制的光电性能，并通过在薄而柔软的基板上进行印刷技术来制造。然而，先前的方法未能解决关于波长选择性的通用功能而不增加制造复杂性。这项工作介绍了一种通过墨水配方工程来印刷波长选择性体异质结光电探测器的通用解决方案。将非富勒烯受体掺入透明的聚合物供体基质中，可以在不使用滤光器或光管理技术的情况下缩小和调整可见光范围内的响应。这种方法有效地将光学响应与粘弹性油墨特性分离开来，从而简化了工艺开发。彻底的形态学和光谱学研究发现，出色的电荷载流子动力学特性使最先进的响应度> 10（2）mA W-1和截止频率> 1.5 MHz。最后，在能够对混合光信号进行多路分解的无滤镜可见光通信系统中，证明了颜色选择性和高性能。

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