Fabrication and characterization of inverted organic PTB7:PC70BM solar cells using Hf-In-ZnO as electron transport layer

Ramirez-Como, Magaly; Balderrama, Víctor S.; Sacramento, Angel; Marsal, Lluís F.; Lastra, G.; Estrada, M.

doi:10.1016/j.solener.2019.02.015

Cited by 29 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The active blend solution consisted in a 25 mg/mL solution of PBDTTT-EFT:PC 70 BM with 1:1.5 (w/w) ratio, in chlorobenzene:DIO (97:3 (%, v/v)). Then the blend is stirred and heated at 40 °C for 18 h. The prepared solution was left for 48 h for aging and then filtered and spun over the ZnO film at 750 rpm for 30 s to obtain a thickness of 100 nm . Lastly, the samples were introduced to a vacuum chamber to thermally evaporate V 2 O 5 followed by Ag films under high-vacuum conditions (≤1 × 10 –6 mbar) to obtain thicknesses of 4 and 100 nm, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Then the blend is stirred and heated at 40 °C for 18 h. The prepared solution was left for 48 h for aging and then filtered and spun over the ZnO film at 750 rpm for 30 s to obtain a thickness of 100 nm. 47 Lastly, the samples were introduced to a vacuum chamber to thermally evaporate V 2 O 5 followed by Ag films under high-vacuum conditions (≤1 × 10 −6 mbar) to obtain thicknesses of 4 and 100 nm, respectively. The evaporation process was performed using a shadow mask to design a cell with an area of 0.09 cm 2 .…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Stability Enhancement of High-Performance Inverted Polymer Solar Cells Using ZnO Electron Interfacial Layer Deposited by Intermittent Spray Pyrolysis Approach

Moustafa

Sánchez

Marsal

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

In this research work, for the first time, stable high-performance inverted polymer solar cells (iPSCs) have been fabricated utilizing facile and low-cost intermittent spray pyrolysis (SP) technique to deposit transparent thin films of zinc oxide (ZnO) as electron interfacial transporting layer (ETL). The performed iPSCs have the structure of ITO/ZnO/PBDTTT-EFT:PC70BM/V2O5/Ag. The thickness diversity of the ETL layer was adjusted by varying the concentration of the ZnO precursor solution, while fixed thicknesses were fabricated for the other layers in the iPSCs. Moreover, the influence of the deposition techniques on the interface roughness, performance, and stability of the devices has been detected and discussed. By increasing the concentration of the ZnO precursor solution as well as the number of spraying running cycles, the thickness and roughness of the ZnO film increase. The highest power conversion efficiency (10%) of the fresh iPSCs with ZnO-SP was obtained by using a ZnO-precursor solution concentration of 1:4 in ethanol with 7 spraying running cycles. This efficiency is almost the same as the iPSCs fabricated ZnO-ETL by the laboratory-scale spin coating (SC) technique that was used as a reference. Furthermore, it was interesting to observe that the stability of the devices intermittently sprayed by ZnO-SP was higher than the controlled reference ones that were fabricated by ZnO-SC. Hence, deep insight studies have been carried out for the fresh and degraded iPSCs using dark current–voltage characteristics and impedance spectroscopy measurements to investigate the electrical parameters for the ZnO film obtained by the SP and SC techniques. The results indicated that the interface roughness between the ZnO and the active layers plays an important role in enhancing light trapping and the light absorbance inside the cell which increases the generated electric current as well as the stability of the devices.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Stability Enhancement of High-Performance Inverted Polymer Solar Cells Using ZnO Electron Interfacial Layer Deposited by Intermittent Spray Pyrolysis Approach

Moustafa

Sánchez

Marsal

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…For example, in 2018, Hf-In-ZnO was used as an electron transport layer in the inverted PTB7:PC 70 BM solar cell, yielding a solar cell with an efficiency of up to 4.15%, with twice the lifetime of a similar OSC with PFN as a buffer layer, because the Hf atoms have a strong thermodynamic tendency to form metal oxides, suppressing the dissociation of Hf-In-ZnO (Table 6). 206 Summary of device performances of organic solar cells using ZnO as cathode buffer layer is shown in Table 6.…”

Section: Introductionmentioning

confidence: 99%

ZnO nanostructured materials for emerging solar cell applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Researchers are exploiting a variety of techniques to enhance the power-conversion efficiency (PCE) of organic solar cells. Some schools of thought still believe that the combination of the most suited hole, electron transport, and buffer layer with a highly efficient bulk-heterojunction as an absorber layer may yield an excellent photovoltaic response [ 11 , 12 , 13 ]. Bulk heterojunction has attracted great interest due to various advantages such as low cost, tunable bandgap and electron affinity, lightweight, and most importantly excellent power conversion efficiency compared to other organic/polymer materials.…”

Section: Introductionmentioning

confidence: 99%

“…Suitable electron and hole transport layers (ETL and HTL) for PTB7:PC70BM create challenges, as PTB7:PC70BM has strong binding (low dielectric constant) energy for exciton with low diffusion length, and despite its heterogeneous nature most of the excitons are lost in recombination [ 11 , 12 ]. If a very thin PTB7:PC70BM layer is used, then these issues can be improved, but the issue of inefficient optical absorption will arise.…”

Section: Introductionmentioning

confidence: 99%

Design of an Efficient PTB7:PC70BM-Based Polymer Solar Cell for 8% Efficiency

Alahmadi

2022

Polymers

View full text Add to dashboard Cite

Polymer semiconductors may have the potential to fully replace silicon in next-generation solar cells because of their advantages such as cheap cost, lightweight, flexibility, and the ability to be processed for very large area applications. Despite these advantages, polymer solar cells are still facing a certain lack of power-conversion efficiency (PCE), which is essentially required for commercialization. Recently, bulk heterojunction of PTB7:PC70BM as an active layer showed remarkable performance for polymer solar cells in terms of PCE. Thus, in this paper, we developed and optimized a novel design using PEDOT:PSS and PFN-Br as electron and hole transport layers (ETL and HTL) for ITO/PEDOT:PSS/PT7B:PC70BM/PFN-Br/Ag as a polymer solar cell, with the help of simulation. The optimized solar cell has a short-circuit current (Isc) of 16.434 mA.cm−2, an open-circuit voltage (Voc) of 0.731 volts, and a fill-factor of 68.055%, resulting in a maximum PCE of slightly above 8%. The findings of this work may contribute to the advancement of efficient bulk-heterojunction-based polymer solar cells.

show abstract

Fabrication and characterization of inverted organic PTB7:PC70BM solar cells using Hf-In-ZnO as electron transport layer

Cited by 29 publications

References 39 publications

Stability Enhancement of High-Performance Inverted Polymer Solar Cells Using ZnO Electron Interfacial Layer Deposited by Intermittent Spray Pyrolysis Approach

Stability Enhancement of High-Performance Inverted Polymer Solar Cells Using ZnO Electron Interfacial Layer Deposited by Intermittent Spray Pyrolysis Approach

ZnO nanostructured materials for emerging solar cell applications

Design of an Efficient PTB7:PC70BM-Based Polymer Solar Cell for 8% Efficiency

Contact Info

Product

Resources

About