TY - JOUR
T1 - Preparation of Hybrid Films Based in Aluminum 8-Hydroxyquinoline as Organic Semiconductor for Photoconductor Applications
AU - Sánchez Vergara, María Elena
AU - Cantera Cantera, Luis Alberto
AU - Rios, Citlalli
AU - Salcedo, Roberto
AU - Lozada Flores, Octavio
AU - Dutt, Ateet
N1 - Publisher Copyright:
© 2023 by the authors.
PY - 2023/9/1
Y1 - 2023/9/1
N2 - In the present work, we have investigated an organic semiconductor based on tris(8-hydroxyquinoline) aluminum (AlQ3) doped with tetracyanoquinodimethane (TCNQ), which can be used as an organic photoconductor. DFT calculations were carried out to optimize the structure of semiconductor species and to obtain related constants in order to compare experimental and theoretical results. Subsequently, AlQ3-TCNQ films with polypyrrole (Ppy) matrix were fabricated, and they were morphologically and mechanically characterized by Scanning Electron Microscopy, X-ray diffraction and Atomic Force Microscopy techniques. The maximum stress for the film is 8.66 MPa, and the Knoop hardness is 0.0311. The optical behavior of the film was also analyzed, and the optical properties were found to exhibit two indirect transitions at 2.58 and 3.06 eV. Additionally, photoluminescence measurements were carried out and the film showed an intense visible emission in the visible region. Finally, a photoconductor was fabricated and electrically characterized. Applying a cubic spline approximation to fit cubic polynomials to the J-V curves, the ohmic to SCLC transition voltage (Formula presented.) and the trap-filled-limit voltage (Formula presented.) for the device were obtained. Then, the free carrier density and trap density for the device were approximated to (Formula presented.) and (Formula presented.), respectively.
AB - In the present work, we have investigated an organic semiconductor based on tris(8-hydroxyquinoline) aluminum (AlQ3) doped with tetracyanoquinodimethane (TCNQ), which can be used as an organic photoconductor. DFT calculations were carried out to optimize the structure of semiconductor species and to obtain related constants in order to compare experimental and theoretical results. Subsequently, AlQ3-TCNQ films with polypyrrole (Ppy) matrix were fabricated, and they were morphologically and mechanically characterized by Scanning Electron Microscopy, X-ray diffraction and Atomic Force Microscopy techniques. The maximum stress for the film is 8.66 MPa, and the Knoop hardness is 0.0311. The optical behavior of the film was also analyzed, and the optical properties were found to exhibit two indirect transitions at 2.58 and 3.06 eV. Additionally, photoluminescence measurements were carried out and the film showed an intense visible emission in the visible region. Finally, a photoconductor was fabricated and electrically characterized. Applying a cubic spline approximation to fit cubic polynomials to the J-V curves, the ohmic to SCLC transition voltage (Formula presented.) and the trap-filled-limit voltage (Formula presented.) for the device were obtained. Then, the free carrier density and trap density for the device were approximated to (Formula presented.) and (Formula presented.), respectively.
KW - DFT calculations
KW - hybrid film
KW - hydroxyquinoline
KW - optical properties
KW - organic photoconductor
UR - http://www.scopus.com/inward/record.url?scp=85172730944&partnerID=8YFLogxK
U2 - 10.3390/s23187708
DO - 10.3390/s23187708
M3 - Artículo
AN - SCOPUS:85172730944
SN - 1424-8220
VL - 23
JO - Sensors (Switzerland)
JF - Sensors (Switzerland)
IS - 18
M1 - 7708
ER -