Abstract: Organic semi-conductor hetero-junction plays very important role in the organic electronic device.It may not only control the movement of charge carries,but also have huge influence on the fundamental processes such as the electron transfer and energy transfer in the functional electronic devices.The energy relationship between different layers has been discussed compendiously,and some problems concerned with the surface energy relationship of hetero-junction have also been discussed.It should be interesting for the design and manipulation of organic electronic devices.

Key words: organic hetero-junction, the structure of surface energy levels, organic electronic devices, energy transfer and electron transfer