Comparative study of electrochemically-grown vanadium pentoxide nanostructures synthesized using differential pulse voltammetry, cyclic voltammetry, and chronoamperometry methods as the hole transport layer

Hasannezhad, Fatemeh; Naji, Leila; Arvand, Majid

doi:10.1016/j.jallcom.2021.163501

Cited by 5 publications

(19 citation statements)

References 109 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the illustrated image in Figure b″, the thickness of LNO in LNO-TF/ED-T2 was estimated to be approximately 325 nm. However, a higher thickness of 750 nm was observed for LNO-TF/ED-T4, which exceeds the acceptable thickness for CTLs in PSCs (see Figure c″). , …”

Section: Resultsmentioning

confidence: 99%

“…A smaller energy difference between these levels indicates a higher probability of hole transfer. The energy level proximity between the LNO and P3HT:PCBM layers increases the density of active sites for charge transfer and accelerates the rate at which holes can pass from the LNO to the P3HT:PCBM . Based on the energy level calculations provided in Table S5, it was determined that the E v level of LNO-TF/ED-V1 was approximately −5.13 eV.…”

Section: Resultsmentioning

confidence: 99%

“…The ED approach has already been utilized to synthesize several metal oxides such as V 2 O 5 , NiO, ZnO, and so on by investigating parameters such as the electrolyte concentration and comparing different ED techniques such as cyclic voltammetry (CV), chronoamperometry (CA), chronopotentiometry (CP), and so on. The findings revealed that by adjusting the indicated parameters and changing the physical and electrochemical properties of the produced nanomaterials, the photovoltaic performance of PSCs could be improved. , …”

Section: Introductionmentioning

confidence: 99%

“…15 In order to avoid the drawbacks of PEDOT:PSS, considerable endeavors have been dedicated to the advancement of alternative HTLs, including metal oxides such as V 2 O 5 , MoO 3 , WO 3 , NiO x , CrO x , and CuO x , polymers, carbon nanotubes, graphene oxide, and reduced graphene oxide. 16,17 Due to the high stability and low cost of binary metal oxides, they have drawn much interest and have been extensively studied as an HTL in PSCs. However, their fixed characteristics, such as band gaps, energy levels, transmittance, conductivity, and so on, are their primary limitations as HTLs.…”

Section: Introductionmentioning

confidence: 99%

“…The findings revealed that by adjusting the indicated parameters and changing the physical and electrochemical properties of the produced nanomaterials, the photovoltaic performance of PSCs could be improved. 16,17 Researchers have recently conducted extensive experimental and computational studies using different device structures, compositions, and fabrication methods to improve the stability and efficiency of PSCs. 25 Computational chemistry, which has developed into a new tool for scientific investigation, can simulate several screening experiments, which could considerably accelerate this research.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Electrochemically Engineered Lanthanum Nickelate as a Promising Transparent Hole-Transport Layer for Bulk Heterojunction Polymer Solar Cells: An Experimental and DFT Study

Jouybar,

Naji,

Mozaffari

et al. 2024

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Lanthanum nickelate (LNO) was grown on an FTO-coated glass slide by employing the chronoamperometry method and used as a hole transport layer (HTL) in bulk heterojunction polymer solar cells (BHJ PSCs). The electrodeposition parameters, including the deposition time, potential magnitude, and electrolyte conditions, were changed to obtain LNO thin films, providing appropriate energy levels as an HTL. The electrochemical, morphological, optical, and structural characteristics of electrochemically produced LNO samples were compared to those of the sample prepared via the sol−gel procedure. The LNO sample prepared by applying −1.18 V while the electrolyte was stirring exhibited significantly better electrochemical and optical properties. The fabricated PSC using this sample provided a considerably higher (45.3%) power conversion efficiency (PCE) than the PSC prepared based on an LNO thin film acquired by the sol−gel method. The superior performance of the BHJ PSC was ascribed to the increased electroactive surface area (1.341 cm 2 ), improved charge mobility (2.30 × 10 −6 cm 2 V −1 s −1 ), and reduced charge recombination probabilities. A short circuit current of 13.24 mA cm 2 , an open circuit voltage of approximately 0.64 V, a fill factor of 70%, an external quantum efficiency of 75.3%, and a PCE of 5.9% were demonstrated by the best fabricated PSC, surpassing the reference device with a PEDOT:PSS HTL. Moreover, the prepared PSC exhibited remarkable ambient stability, maintaining 84% of its initial PCE after 450 h of aging. The agreement between DFT calculations and experimental results confirmed that LNO possesses the optical and elastic characteristics required to improve the efficiency and stability of PSCs as an HTL.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%