MEASUREMENTS OF CONDUCTION BANDS AND ELECTRON AFFINITIES OF ORGANIC SOLIDS BY SURFACE BARRIER.

为了研究有机薄膜的导带，我们研制了低能电子透射谱仪。晶体长链烷烃中准自由电子的基态能量Vo（减去电子亲合势E_A）为0.5 <plus-minus>± 0.1eV。发现熔化状态的值为负。在结晶态下，透射峰与导带的高态密度值直接对应，聚苯乙烯、聚2-乙烯基吡啶、聚2-乙烯基萘和聚N-乙烯基咔唑的E_A分别为0.4eV、0.3eV、0.6eV和1.8eV。

LOW-ENERGY ELECTRON TRANSMISSION SPECTROMETER WAS CONSTRUCTED IN ORDER TO INVESTIGATE THE CONDUCTION BANDS OF ORGANIC THIN FILMS. THE GROUND STATE ENERGY OF THE QUASI-FREE ELECTRON Vo (MINUS OF THE ELECTRON AFFINITY E_A) IN CRYSTALLINE LONG-CHAIN ALKANES WAS DETERMINED TO BE 0.5 <plus-minus>0.1 eV. THE VALUE FOR THE MOLTEN STATE WAS FOUND TO BE NEGATIVE. FURTHER IN THE CRYSTALLINE STATE, EVIDENCE WAS FOUND FOR A DIRECT CORRESPONDENCE BETWEEN THE TRANSMISSION MAXIMA AND THE HIGH VALUE OF THE DENSITY OF STATES IN THE CONDUCTION BANDS.On THE OTHER HAND,THE E_A's OF POLYSTYRENE, POLY(2-VINYLPYRIDINE), POLY(2-VINYLNAPHTHALENE) AND POLY(N-VINYLCARBAZOLE) WERE DETERMINED TO BE 0.4 eV, 0.3 eV, 0.6 eV and 1.8 eV, respectively.