Technology Description

- Electron affinity (LUMO Level) is the key parameters for the R&D of the organic electronics.
- Conventional Inverse Photo-emission Spectroscopy (IPES) has a concern that target materials are easy to be damaged and Energy resolution is low.
- Low-Energy Inverse Photoemission Spectroscopy (LEIPS) could solve this issue.

International publication number: WO 2015182641

Potential Benefits

- Almost no damage onto the target materials
Use of low-energy electron reduces damage to the target material.
- Easy adaption of the standard spectroscopy technology
Emitted photon energy(hν) shifts from VUV to NUV region.
VUV : Vacuum Ultra Violet
NUV : Near Ultra Violet
- Resolution improvement
Detection precision/resolution is improved a factor of 2 (< 0.3 eV)
- available at low vacuum condition



Suggested Applications

R&D of organic electronics such as organic light emitting diode and organic photovoltaic cells.

EP Patent
Prof. Hiroyuki YOSHIDA
Japan Science and Technology Agency (JST) plays a central role in Japan's Science and Technology Basic Plan. Based on science and technology targets issued by the government we fund basic research, commercialization of new technologies, distribution of science and technology information, and in recent years promote international joint research and the fostering of next generation human resources. Website:
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