SURFACE PHOTOVOLTAGE MEASUREMENTS ON PYRITE(100) CLEAVAGE PLANES - EVIDENCE FOR ELECTRONIC BULK DEFECTS

被引:60
作者
BRONOLD, M [1 ]
PETTENKOFER, C [1 ]
JAEGERMANN, W [1 ]
机构
[1] HAHN MEITNER INST BERLIN GMBH,BEREICH PHYS CHEM,D-14109 BERLIN,GERMANY
关键词
D O I
10.1063/1.358393
中图分类号
O59 [应用物理学];
学科分类号
摘要
Temperature dependent contactless surface photovoltage measurements by photoelectron spectroscopy have been performed on cleaved (100) surfaces of pyrite (FeS2) single crystals. The results have been fitted by thermionic emission, recombination, and tunneling models for the majority carrier transport to the surface. Neither of them is able to explain the small photovoltages consistently. By calculating electronic defect levels due to the sulfur deficiency of pyrite a high number of defect states in the band gap is obtained. As a consequence a nonuniform depletion layer is expected with a part of the band bending potential falling off at a very small distance near the surface. The small photovoltages can be explained by a tunneling of majority carriers through the narrow barrier and by recombination losses due to the defects.
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页码:5800 / 5808
页数:9
相关论文
共 51 条
[1]   SURFACE PHOTOVOLTAGE EFFECTS IN PHOTOEMISSION FROM METAL-GAP(110) INTERFACES - IMPORTANCE FOR BAND-BENDING EVALUATION [J].
ALONSO, M ;
CIMINO, R ;
HORN, K .
PHYSICAL REVIEW LETTERS, 1990, 64 (16) :1947-1950
[2]   PREPARATION OF PYRITE FILMS BY PLASMA-ASSISTED SULFURIZATION OF THIN IRON FILMS [J].
BAUSCH, S ;
SAILER, B ;
KEPPNER, H ;
WILLEKE, G ;
BUCHER, E ;
FROMMEYER, G .
APPLIED PHYSICS LETTERS, 1990, 57 (01) :25-27
[3]   SULFUR DEFICIENCY IN IRON PYRITE (FES2-X) AND ITS CONSEQUENCES FOR BAND-STRUCTURE MODELS [J].
BIRKHOLZ, M ;
FIECHTER, S ;
HARTMANN, A ;
TRIBUTSCH, H .
PHYSICAL REVIEW B, 1991, 43 (14) :11926-11936
[4]   SURFACE PREPARATION OF FES2 VIA ELECTROCHEMICAL ETCHING AND INTERFACE FORMATION WITH METALS [J].
BRONOLD, M ;
BUKER, K ;
KUBALA, S ;
PETTENKOFER, C ;
TRIBUTSCH, H .
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1993, 135 (01) :231-243
[5]   SURFACE-ANALYSIS INVESTIGATIONS ON THE REACTION OF FES2 WITH ALKALI-METALS [J].
BRONOLD, M ;
PETTENKOFER, C ;
JAEGERMAN, W .
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1991, 95 (11) :1475-1479
[6]   SURFACE-STATES ON CUBIC D-BAND SEMICONDUCTOR PYRITE (FES(2)) [J].
BRONOLD, M ;
TOMM, Y ;
JAEGERMANN, W .
SURFACE SCIENCE, 1994, 314 (03) :L931-L936
[7]  
BRONOLD M, UNPUB
[8]   PHOTOVOLTAIC OUTPUT LIMITATION OF N-FES2 (PYRITE) SCHOTTKY BARRIERS - A TEMPERATURE-DEPENDENT CHARACTERIZATION [J].
BUKER, K ;
ALONSOVANTE, N ;
TRIBUTSCH, H .
JOURNAL OF APPLIED PHYSICS, 1992, 72 (12) :5721-5728
[9]   ELECTRONIC-STRUCTURE OF 3D-PYRITE-TYPE AND MARCASITE-TYPE SULFIDES [J].
BULLETT, DW .
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1982, 15 (30) :6163-6174
[10]   CARRIER TRANSPORT ACROSS METAL-SEMICONDUCTOR BARRIERS [J].
CHANG, CY ;
SZE, SM .
SOLID-STATE ELECTRONICS, 1970, 13 (06) :727-+