DETERMINATION OF GAP-STATE DISTRIBUTIONS IN AMORPHOUS-SEMICONDUCTORS FROM TRANSIENT PHOTOCURRENTS USING A FOURIER-TRANSFORM TECHNIQUE

被引:58
作者
MAIN, C [1 ]
BRUGGEMANN, R [1 ]
WEBB, DP [1 ]
REYNOLDS, S [1 ]
机构
[1] UNIV STUTTGART,INST PHYS ELEKTR,W-7000 STUTTGART 80,GERMANY
关键词
D O I
10.1016/0038-1098(92)90076-L
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We present a novel spectroscopic technique for the computation of the distribution of gap-states (DOS) in amorphous semiconductors from transient photocurrent decay exhibiting either anomalous or conventional dispersion. A numerical Fourier Transform procedure is used to convert the impulse response time decay data to phase and amplitude frequency spectra. The DOS is then computed using a procedure developed for analysis of modulated photocurrent (MPC) data in a multiple-trapping context. The method avoids many of the distortions and practical difficulties associated with other TPC analytical techniques. Computer generated TPC and MPC data are used to evaluate the transform technique in comparison with a 'direct' interpretive method for model systems of discrete and distributed states.
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收藏
页码:401 / 405
页数:5
相关论文
共 12 条
[1]  
BRUGGEMANN R, 1990, PHILOS MAG B, V62, P29
[2]  
MAIN C, 1991, NEW PHYSICAL PROBLEMS IN ELECTRONIC MATERIALS, P55
[3]   EXCESS CARRIER DISPERSION IN CONVENTIONALLY DISPERSIVE AMORPHOUS-SEMICONDUCTORS AND THE MOBILITY-LIFETIME ANOMALY IN A-SI-H [J].
MAIN, C ;
BERKIN, J ;
BRUGGEMANN, R ;
MARSHALL, JM .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1991, 137 :439-442
[4]   CALCULATION OF LOCALIZED-STATE ENERGY-DISTRIBUTIONS FROM TRANSIENT-PHOTORESPONSE DATA [J].
MARSHALL, JM ;
BERKIN, J ;
MAIN, C .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1987, 56 (05) :641-652
[5]   CARRIER DIFFUSION IN AMORPHOUS-SEMICONDUCTORS [J].
MARSHALL, JM .
REPORTS ON PROGRESS IN PHYSICS, 1983, 46 (10) :1235-1282
[6]   TRANSIENT PHOTOCONDUCTIVITY AND THERMALIZATION IN AMORPHOUS-SEMICONDUCTORS [J].
MARSHALL, JM ;
MAIN, C .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1983, 47 (05) :471-480
[7]   DETERMINATION OF LOCALIZED STATE DISTRIBUTIONS FROM ANOMALOUSLY-DISPERSIVE TRANSPORT DATA [J].
MICHIEL, H ;
MARSHALL, JM ;
ADRIAENSSENS, GJ .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1983, 48 (02) :187-202
[9]   A MULTIPLE-TRAPPING MODEL WITH OPTICAL BIAS [J].
PANDYA, R ;
SCHIFF, EA .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1985, 52 (06) :1075-1095
[10]  
SCHIFF EA, 1985, MRS P PITTSBURG, V118