Optical Properties of Cobalt Doped TiO2 Thin Films: Study of Degradation under Band Gap Edge of 412 nm Light Illumination

Ayşe Nur Şahin; Berke Tuncay; Zeynep Güven Özdemir

Makale detayları

Optical Properties of Cobalt Doped TiO2 Thin Films: Study of Degradation under Band Gap Edge of 412 nm Light Illumination

Yazarlar:

Ayşe Nur Şahin | Berke Tuncay | Zeynep Güven Özdemir

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Atomik | Moleküler ve Optik Fizik (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 3, pp.462-470

Belge Tipi:

Makale

Yayın Tarihi:

10/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001348297

pISSN:

2149-3367

Anahtar kelimeler:

Özet:

 In this study, it has been aimed to investigate the effect of Co doping on the optical properties of TiO2 thin film and the change in optical properties of Co doped TiO2 thin film with the widest optical bandgap during illuminating by light. For this purpose, Pure and cobalt-doped TiO2 thin films have been prepared by sol-gel technique. The optical properties of the thin films have been characterized by ultraviolet-visible UV-Vis light spectrometer. The optical bandgap, transmittance, reflectance and refractive index have been determined. The highest optical bandgap has been recorded for the 3 Co doping as 3.01 eV. Additionally, it has been determined that since cobalt exhibits absorption characteristics that differ from TiO2, particularly at longer wavelengths, it leads to a decrease in the effective refractive index for the composites. The results indicated that the cobalt additive significantly enhanced photo-degradation. To analyze this effect, the composite having 3 Co doping has also been illuminated by 412 nm light that corresponds to 3.01 eV between 20 minutes and 1 hour. As a result, a slight increase in the absorbance has been recorded.

 In this study, it has been aimed to investigate the effect of Co doping on the optical properties of TiO2 thin film and the change in optical properties of Co doped TiO2 thin film with the widest optical bandgap during illuminating by light. For this purpose, Pure and cobalt-doped TiO2 thin films have been prepared by sol-gel technique. The optical properties of the thin films have been characterized by ultraviolet-visible UV-Vis light spectrometer. The optical bandgap, transmittance, reflectance and refractive index have been determined. The highest optical bandgap has been recorded for the 3 Co doping as 3.01 eV. Additionally, it has been determined that since cobalt exhibits absorption characteristics that differ from TiO2, particularly at longer wavelengths, it leads to a decrease in the effective refractive index for the composites. The results indicated that the cobalt additive significantly enhanced photo-degradation. To analyze this effect, the composite having 3 Co doping has also been illuminated by 412 nm light that corresponds to 3.01 eV between 20 minutes and 1 hour. As a result, a slight increase in the absorbance has been recorded.

 In this study, it has been aimed to investigate the effect of Co doping on the optical properties of TiO2 thin film and the change in optical properties of Co doped TiO2 thin film with the widest optical bandgap during illuminating by light. For this purpose, Pure and cobalt-doped TiO2 thin films have been prepared by sol-gel technique. The optical properties of the thin films have been characterized by ultraviolet-visible UV-Vis light spectrometer. The optical bandgap, transmittance, reflectance and refractive index have been determined. The highest optical bandgap has been recorded for the 3 Co doping as 3.01 eV. Additionally, it has been determined that since cobalt exhibits absorption characteristics that differ from TiO2, particularly at longer wavelengths, it leads to a decrease in the effective refractive index for the composites. The results indicated that the cobalt additive significantly enhanced photo-degradation. To analyze this effect, the composite having 3 Co doping has also been illuminated by 412 nm light that corresponds to 3.01 eV between 20 minutes and 1 hour. As a result, a slight increase in the absorbance has been recorded.

 Bu çalışmada, Co katkısının TiO2 ince filminin optik özellikleri üzerindeki etkisi ve en geniş optik bant aralığına sahip Co katkılı TiO2 ince filminin ışıkla aydınlatılması sırasında optik özelliklerindeki değişimin incelenmesi amaçlanmıştır. Bu amaçla, saf ve kobalt katkılı TiO2 ince filmler sol-jel tekniği ile hazırlanmıştır. İnce filmlerin optik özellikleri ultraviyole-görünür UV-Vis ışık spektrometresi ile karakterize edilmiştir. Optik bant aralığı, geçirgenlik, yansıma ve kırılma indisi belirlenmiştir. En yüksek optik bant aralığı 3 Co katkısı için 3.01 eV olarak hesaplanmıştır. Ayrıca, kobaltın özellikle uzun dalga boylarında TiO2den farklı soğurma özellikleri sergilemesi nedeniyle, bileşimlerin kırılma indisinde bir düşüşe yol açtığı belirlenmiştir. Sonuçlar, kobalt katkısının foto-bozunmayı önemli ölçüde artırdığını göstermiştir. Bu etkiyi analiz etmek için, 3 Co katkılı bileşimde 20 dakika ile 1 saat arasında 3,01 eVa karşılık gelen 412 nm ışıkla aydınlatılmıştır. Sonuç olarak, absorbans değerinde hafif bir artış görülmüştür.

Makale detayları

Optical Properties of Cobalt Doped TiO2 Thin Films: Study of Degradation under Band Gap Edge of 412 nm Light Illumination

Yazarlar:

Ayşe Nur Şahin | Berke Tuncay | Zeynep Güven Özdemir

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Atomik | Moleküler ve Optik Fizik (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 3, pp.462-470

Belge Tipi:

Makale

Yayın Tarihi:

10/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001348297

pISSN:

2149-3367

TiO2 thin film

Sol-gel

Cobalt dopant

Photo-degredationTiO2 ince film

Sol-jel

Kobalt katkı

Foto-bozulma

Sayı

Makale detayları

Yazarlar: Ayşe Nur Şahin | Berke Tuncay | Zeynep Güven Özdemir

Yayıncı: Afyon Kocatepe University

Ana Başlıklar: Atomik | Moleküler ve Optik Fizik (Diğer)

Dergi: Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 3, pp.462-470

Belge Tipi: Makale

Yayın Tarihi: 10/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001348297

pISSN: 2149-3367

Sayı

Yazarlar:

Ayşe Nur Şahin | Berke Tuncay | Zeynep Güven Özdemir

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Atomik | Moleküler ve Optik Fizik (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 3, pp.462-470

Belge Tipi:

Makale

Yayın Tarihi:

10/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001348297

pISSN:

2149-3367