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Efficient organic light-emitting diodes using polycrystalline silicon thin films as semitransparent anode

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6 Author(s)
Zhu, X.L. ; Center for Display Research and Department of Electrical and Electronic Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People’s Republic of China ; Sun, J.X. ; Peng, H.J. ; Meng, Z.G.
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Polycrystalline silicon (p-Si) is a good material for the construction of thin-film transistors (TFT). It is used for fabricating active-matrix organic light-emitting diode (AMOLED) displays. In this letter, we propose and demonstrate the application of boron-doped p-Si as a semi-transparent anode in making different color OLEDs. Without removing the ultrathin native oxide on the p-Si surface and employing p-doped hole transport layer to enhance holes injection, these OLEDs show comparable or even better performance to conventional OLEDs which use ITO as anodes. The present technique has the advantage of less masking steps in making AMOLED.

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Applied Physics Letters  (Volume:87 ,  Issue: 8 )