TY - JOUR
T1 - Effect of Interfacial Polarization on the Trap Passivation and Dielectric Constant of SrF2/TiO2 for Dye-Sensitized Solar Cells
AU - Kaliamurthy, Ashok Kumar
AU - Asiam, Francis Kwaku
AU - Yadagiri, Bommaramoni
AU - Chen, Cheng
AU - Kang, Hyeong Cheol
AU - Sandhu, Sanjay
AU - Qamar, Muhammad Zain
AU - Yoo, Kicheon
AU - Lee, Jae Joon
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/3/11
Y1 - 2024/3/11
N2 - A dye-sensitized solar cell (DSSC) architecture is presented with the high dielectric SrF2 incorporated into a semiconducting TiO2 photoanode (SrF2/TiO2). Polarization at the dielectric/semiconductor interface with the optimum composition of SrF2/TiO2 (%w/w 10/90) enhances the charge separation and dielectric constant of SrF2/TiO2 (ϵ′=6.844 × 106), which tends to increase the charge transport kinetics and the charge collection efficiency of the DSSC by balancing the dye loading and the charge recombination at the photoanode. The strong electrostatic shielding of SrF2 is responsible for the reduced recombination, which can impede the back electron transfer in a device, and the intermediate trap levels are passivated by electron filling through the interfacial polarization effect. The power conversion efficiency (PCE) was improved to 7.58% with respect to the reference DSSC (6.99%) at 1-sun illumination, while the PCE reached up to ca. 16.01% with a high output power of 59.41 μW·cm-2 under 1000 lx intensity by LED-5000K.
AB - A dye-sensitized solar cell (DSSC) architecture is presented with the high dielectric SrF2 incorporated into a semiconducting TiO2 photoanode (SrF2/TiO2). Polarization at the dielectric/semiconductor interface with the optimum composition of SrF2/TiO2 (%w/w 10/90) enhances the charge separation and dielectric constant of SrF2/TiO2 (ϵ′=6.844 × 106), which tends to increase the charge transport kinetics and the charge collection efficiency of the DSSC by balancing the dye loading and the charge recombination at the photoanode. The strong electrostatic shielding of SrF2 is responsible for the reduced recombination, which can impede the back electron transfer in a device, and the intermediate trap levels are passivated by electron filling through the interfacial polarization effect. The power conversion efficiency (PCE) was improved to 7.58% with respect to the reference DSSC (6.99%) at 1-sun illumination, while the PCE reached up to ca. 16.01% with a high output power of 59.41 μW·cm-2 under 1000 lx intensity by LED-5000K.
KW - DSSC
KW - SrF
KW - high dielectric constant
KW - interfacial polarization
KW - low-intensity light condition
KW - trap passivation
UR - http://www.scopus.com/inward/record.url?scp=85186070038&partnerID=8YFLogxK
U2 - 10.1021/acsaem.3c03140
DO - 10.1021/acsaem.3c03140
M3 - Article
AN - SCOPUS:85186070038
SN - 2574-0962
VL - 7
SP - 1983
EP - 1992
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 5
ER -