有机光电过程是有机光电子学研究领域的国际前沿，最新研究发现，有机非线性光电过程成为该领域最新的研究焦点。有机非线性光电过程本质上激发态自旋多重态之间的非线性转换过程，例如单线态裂变和三线态聚变过程。本项目拟采用多种磁场效应、瞬态电致发光、光致发光等原位测试技术，研究有机非线性光电现象的物理过程和影响因素，并在此基础上，设计和开发基于非线性光电过程的新型OLED器件，实现基于新原理的电致发光能量上转换器件和超高外量子效率的电致发光器件。创新性体现在采用多种原位测试技术联用的方发，揭示与自旋有关的因素影响非线性光电过程的规律，开发基于新原理的OLED器件，该项目的顺利进行对丰富有机光电子学理论具有非常重要的科学价值。

Organic photoelectric process is international frontier of the organic optoelectronics. Recently, the nonlinear photoelectric process becomes the new research focus of the field. Nonlinear organic photoelectric process is essentially conversion process between spin multiplicities of the excited states, such as singlet fission and triplet fusion processes. This project aims to utilize in-situ testing techniques, for instance magnetic field effect, transient electroluminescence, and photoluminescence measurements, to investigate the physics process and influence factors of nonlinear photoelectric phenomena. And then design and fabricate OLEDs based on the principle of nonlinear photoelectric process to realize the electric-pumped energy up-conversion and electroluminescence with high external quantum efficiency. The originality of this project is combining with a variety of in-situ testing technologies, to reveal the spin factors influencing the nonlinear photoelectric process and the development of OLEDs based on new principle. This project shows very important science significance in organic optoelectronics.