THERMOELECTRIC CHARACTERIZATION OF N-TYPE (Bi2Te3)Se3 SEMICONDUCTORS IN A TEMPERATURE RANGE 11-373 K

Yıl 2005, Cilt: 18 Sayı: 3, 481 - 487, 12.08.2010

Raşit Ahıska Eyüp Güler Selim Acar Mehmet Kasap

Öz

ABSTRACT

The two n-type (Bi2Te3)Se3 semiconductor samples were grown from Bi2Te3 and Bi2Se3 components using traveling heater and pulverized methods. Thermoelectric properties such as electrical conductivity and Seebeck coefficient have been measured in a temperature range 11-373 K using Harman technique. At the room temperature, the Z parameter has been calculated as 4.1x10-3 K-1 and 2.4x10-3 K-1 for the samples grown by the traveling heater methods, respectively.

Anahtar Kelimeler

Key Words: Traveling heater and heat pressing methods, Harman technique, thermoelectric properties

N-TİPİ (Bi2Te3)Se3 YARIİLETKEN KRİSTALLERİN 11-373 K SICAKLIK ARALIĞINDA TERMOELEKTRİK KARAKTERİZASYONU

Öz

İki adet n-tipi (Bi2Te3)Se3 yarıiletkeni Bi2Te3 ve Bi2Se3 bileşimlerinden, bölge eritme ve presleme yöntemi ile büyütüldü. Bu yarıiletken numunelerin termoelektrik özellikleri; elektriksel iletkenlik ve Seebeck kat sayısı 11-373 K sıcaklık aralığında Harman tekniği kullanılarak ölçüldü. Oda sıcaklığında, Z parametresi bölge eritme yöntemi ile büyütülen numune için 4,1x10-3 K-1presleme yöntemi ile büyütülen yarıiletken numune için 2,4x10-3 K-1 olarak hesaplandı

Anahtar Kelimeler

Bölge eritme ve presleme yöntemi, Harman tekniği, Termoelektrik özellikler

Kaynakça

• http://www.melcor.com homepage of Melcor, USA (2004)
• Bowley A. E, Inst A., Cowles L E J., Williams G J., Goldsmid H J, Inst F, Measurement of the figure of merit of a thermoelectric material Journal of Scientific Instruments, 38: 433-435 (2002)
• Waclawek W. and Zabkowska M., “Apparatus for the measurement of thermoelectrical properties”, Journal of Physics E: Scientific Instruments, 14: 618-620 (1981)
• Burke, E.J., Buist, R. J., “Thermoelectric Coolers As Power Generators”, 18th Intersociety Energy Conversion Engineering Conference, Florida. (1983)
• Ioffe A.F. “Poluprovodnikovıe Termoelementı”, edited by P.V.Gultaiev, Pres. Akademia Nauk SSSR , Moscow (1960)
• Buist R. J., “in Handbook of Thermoelectrics CRC”, edited by D.M. Rowe, Pres. Inc New York, (1995 )
• Lahalle - Gravıer C., “Thermoelectric Characterization of Bi2T2,55Se0,45 Solid Solutions”, J. Phys. Chem. Solids, 59(1): 13-20, (1997)
• Lendir B., “Effect of Antimany Content of the Thermoelectric Figure of Merit of Bi1-xSbx Allays”, J. Phys. Chem. Solids, 59(1): 129-134 (1997)
• Buist R. J., “in 11th International Conference on Thermoelectric” October 7-8, Arlington TX USA, 57-61 (1992)
• Min G., Rowe D.M., “in Proc. 5th European Workshop on Thermoelectrics”, Pardubice, Czechia, September 20-21, 81-87 (1999)
• Toshitaka O., Takenobu K, “in Handbook of Thermoelectrics CRC”, edited by D.M. Rowe, Pres. Inc New York, (1995 )
• Harman T. C., “Special Techniques for Measurement of Thermoelectric Properties”, J.Appl. Phys.13: 440 (1962)
• Caıllat T., “Preparation and Thermoelectric Properties of Some Arsenopirite Phases Based on RuSd2-x Te2x and RuSb2-2x Se2x Solid Solutions”, J. Phys. Chem. Solids, 59(1): 61-67 (1997)