An Investigation of Structural, Optical and Pyroelectrical Properties of LiTaO3

Mustafa Buyukharman; Ahmet Ünverdi; Fahrettin Sarcan; Şule Özdilek; Alican Ökçün; Ayşe Erol

Makale detayları

An Investigation of Structural, Optical and Pyroelectrical Properties of LiTaO3

Yazarlar:

Mustafa Buyukharman | Ahmet Ünverdi | Fahrettin Sarcan | Şule Özdilek | Alican Ökçün | Ayşe Erol

Yayıncı:

Gazi University

Ana Başlıklar:

Photonics | Optoelectronics and Optical Communications | General Physics | Material Physics | Compound Semiconductors | Electronic | Optics and Magnetic Materials

Dergi:

Gazi University Journal of Science Vol.38 Issue 1, pp.372-381

Belge Tipi:

Makale

Yayın Tarihi:

1/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001341138

pISSN:

2147-1762

Anahtar kelimeler:

Özet:

 In this study, structural, optical, and pyroelectric properties of Z-cut single crystal LiTaO3 bulk materials with thicknesses of 27 µm and 250 µm are analyzed. XRD results show characteristic diffraction peaks of Z-cut LiTaO3 at 012, 006, and 202, along with a Ta2O5 peak due to Li-deficiency. The strong 006 peak confirms a high c-orientation, indicating pyroelectric potential. Raman spectroscopy confirms agreement with known vibration modes of bulk LiTaO3. Band gap values for the 27 µm and 250 µm samples are determined as 4.44 eV and 4.65 eV, respectively, with both showing a direct band gap. Temperature changes from 30  to 180  were applied at rates of 50 , 100 , and 150 . As temperatures rose, negative pyroelectric currents were observed; with cooling, currents shifted positive. The 250 µm thick, 24 mm² LiTaO3 wafer produced about 4 nA at 50  rate, rising to 12-13 nA at 150 . With larger surface areas yielding higher currents, measurements on three wafers at a 50  change showed the highest-area sample producing 7.5 nA, while the smallest yielded 0.5 nA. The mean pyroelectric current density was higher in 27 µm 180 µAm² than in 250 µm 125 µAm², and the pyroelectric coefficient increased with decreasing thickness, measured at 33.43 µCm²K 27 µm and 23.22 µCm²K 250 µm. These results suggest the potential of LiTaO3 crystals in IR detectors and self-powered deep UV detector applications due to their wide band gap.

 In this study, structural, optical, and pyroelectric properties of Z-cut single crystal LiTaO3 bulk materials with thicknesses of 27 µm and 250 µm are analyzed. XRD results show characteristic diffraction peaks of Z-cut LiTaO3 at 012, 006, and 202, along with a Ta2O5 peak due to Li-deficiency. The strong 006 peak confirms a high c-orientation, indicating pyroelectric potential. Raman spectroscopy confirms agreement with known vibration modes of bulk LiTaO3. Band gap values for the 27 µm and 250 µm samples are determined as 4.44 eV and 4.65 eV, respectively, with both showing a direct band gap. Temperature changes from 30  to 180  were applied at rates of 50 , 100 , and 150 . As temperatures rose, negative pyroelectric currents were observed; with cooling, currents shifted positive. The 250 µm thick, 24 mm² LiTaO3 wafer produced about 4 nA at 50  rate, rising to 12-13 nA at 150 . With larger surface areas yielding higher currents, measurements on three wafers at a 50  change showed the highest-area sample producing 7.5 nA, while the smallest yielded 0.5 nA. The mean pyroelectric current density was higher in 27 µm 180 µAm² than in 250 µm 125 µAm², and the pyroelectric coefficient increased with decreasing thickness, measured at 33.43 µCm²K 27 µm and 23.22 µCm²K 250 µm. These results suggest the potential of LiTaO3 crystals in IR detectors and self-powered deep UV detector applications due to their wide band gap.

 In this study, structural, optical, and pyroelectric properties of Z-cut single crystal LiTaO3 bulk materials with thicknesses of 27 µm and 250 µm are analyzed. XRD results show characteristic diffraction peaks of Z-cut LiTaO3 at 012, 006, and 202, along with a Ta2O5 peak due to Li-deficiency. The strong 006 peak confirms a high c-orientation, indicating pyroelectric potential. Raman spectroscopy confirms agreement with known vibration modes of bulk LiTaO3. Band gap values for the 27 µm and 250 µm samples are determined as 4.44 eV and 4.65 eV, respectively, with both showing a direct band gap. Temperature changes from 30  to 180  were applied at rates of 50 , 100 , and 150 . As temperatures rose, negative pyroelectric currents were observed; with cooling, currents shifted positive. The 250 µm thick, 24 mm² LiTaO3 wafer produced about 4 nA at 50  rate, rising to 12-13 nA at 150 . With larger surface areas yielding higher currents, measurements on three wafers at a 50  change showed the highest-area sample producing 7.5 nA, while the smallest yielded 0.5 nA. The mean pyroelectric current density was higher in 27 µm 180 µAm² than in 250 µm 125 µAm², and the pyroelectric coefficient increased with decreasing thickness, measured at 33.43 µCm²K 27 µm and 23.22 µCm²K 250 µm. These results suggest the potential of LiTaO3 crystals in IR detectors and self-powered deep UV detector applications due to their wide band gap.

 In this study, structural, optical, and pyroelectric properties of Z-cut single crystal LiTaO3 bulk materials with thicknesses of 27 µm and 250 µm are analyzed. XRD results show characteristic diffraction peaks of Z-cut LiTaO3 at 012, 006, and 202, along with a Ta2O5 peak due to Li-deficiency. The strong 006 peak confirms a high c-orientation, indicating pyroelectric potential. Raman spectroscopy confirms agreement with known vibration modes of bulk LiTaO3. Band gap values for the 27 µm and 250 µm samples are determined as 4.44 eV and 4.65 eV, respectively, with both showing a direct band gap. Temperature changes from 30  to 180  were applied at rates of 50 , 100 , and 150 . As temperatures rose, negative pyroelectric currents were observed; with cooling, currents shifted positive. The 250 µm thick, 24 mm² LiTaO3 wafer produced about 4 nA at 50  rate, rising to 12-13 nA at 150 . With larger surface areas yielding higher currents, measurements on three wafers at a 50  change showed the highest-area sample producing 7.5 nA, while the smallest yielded 0.5 nA. The mean pyroelectric current density was higher in 27 µm 180 µAm² than in 250 µm 125 µAm², and the pyroelectric coefficient increased with decreasing thickness, measured at 33.43 µCm²K 27 µm and 23.22 µCm²K 250 µm. These results suggest the potential of LiTaO3 crystals in IR detectors and self-powered deep UV detector applications due to their wide band gap.

Makale detayları

An Investigation of Structural, Optical and Pyroelectrical Properties of LiTaO3

Yazarlar:

Mustafa Buyukharman | Ahmet Ünverdi | Fahrettin Sarcan | Şule Özdilek | Alican Ökçün | Ayşe Erol

Yayıncı:

Gazi University

Ana Başlıklar:

Photonics | Optoelectronics and Optical Communications | General Physics | Material Physics | Compound Semiconductors | Electronic | Optics and Magnetic Materials

Dergi:

Gazi University Journal of Science Vol.38 Issue 1, pp.372-381

Belge Tipi:

Makale

Yayın Tarihi:

1/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001341138

pISSN:

2147-1762

LiTaO3

Pyroelectric

Pyrocurrent

IR detector

Pyroelectric material

Sayı

Makale detayları

An Investigation of Structural, Optical and Pyroelectrical Properties of LiTaO3

Yazarlar: Mustafa Buyukharman | Ahmet Ünverdi | Fahrettin Sarcan | Şule Özdilek | Alican Ökçün | Ayşe Erol

Yayıncı: Gazi University

Ana Başlıklar: Photonics | Optoelectronics and Optical Communications | General Physics | Material Physics | Compound Semiconductors | Electronic | Optics and Magnetic Materials

Dergi: Gazi University Journal of Science Vol.38 Issue 1, pp.372-381

Belge Tipi: Makale

Yayın Tarihi: 1/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001341138

pISSN: 2147-1762

LiTaO3

Pyroelectric

Pyrocurrent

IR detector

Pyroelectric material

Sayı

Yazarlar:

Mustafa Buyukharman | Ahmet Ünverdi | Fahrettin Sarcan | Şule Özdilek | Alican Ökçün | Ayşe Erol

Yayıncı:

Gazi University

Ana Başlıklar:

Photonics | Optoelectronics and Optical Communications | General Physics | Material Physics | Compound Semiconductors | Electronic | Optics and Magnetic Materials

Dergi:

Gazi University Journal of Science Vol.38 Issue 1, pp.372-381

Belge Tipi:

Makale

Yayın Tarihi:

1/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001341138

pISSN:

2147-1762