Separation of Electrical and Optical Energy Gaps: Selectively Adjusting the Electrical and Optical Properties for a Highly Efficient Blue Emitter |
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| Authors: | Dr He Liu Dr Ping Chen Dr Dehua Hu Xiangyang Tang Dr Yuyu Pan Huanhuan Zhang Wenqiang Zhang Xiao Han Qing Bai Prof Ping Lu Prof Yuguang Ma |
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| Institution: | State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun, 130012 (P.R. China) |
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| Abstract: | The design concept of separation of optical and electrical bandgap for wide bandgap materials is further developed in DCzSiPI. The HOMO/LUMO levels can be tuned by incorporation of PI and DCz substituents. The tetraphenylsilane core avoids the intramolecular charge transfer from DCz to PI (DCz=dimer carbazole, PI=phenanthro9,10‐d]imidazole). The allowed transitions are found to be from HOMO?1 to LUMO providing DCzSiPI with sufficient bandgap. |
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| Keywords: | bipolar carbazole donor– acceptor systems silanes bandgap |
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