1987 Fiscal Year Final Research Report Summary

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

Research Project

Project/Area Number	61550005
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	Applied materials
Research Institution	CHIBA UNIVERSITY
Principal Investigator	UENO Nobuo EACULTY OF ENG, CHIBA UNIVERSITY , RESEARCH ASSOCIATE, 工学部, 助手 (40111413)
Project Period (FY)	1986 – 1987
Keywords	ELECTRON AFFINITY / ELECTRON SCATTERING / ELECTRON TRANSMISSION / PHOTORECEPTOR / 垂直配向膜 / LB膜
Research Abstract	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.