Energy-level engineering of the electron transporting layer for improving open-circuit voltage in dye and perovskite-based solar cells

2019 ◽  
Vol 12 (3) ◽  
pp. 958-964 ◽  
Author(s):  
Seong Sik Shin ◽  
Jae Ho Suk ◽  
Bong Joo Kang ◽  
Wenping Yin ◽  
Seon Joo Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Transport Layer ◽  
Fine Tuning ◽  
Electron Transport Layer ◽  
Electron Transporting Layer ◽  
Sensitized Solar Cells

BaSnO3 is designed as an electron transport layer of high-efficiency perovskite and dye-sensitized solar cells by fine-tuning energy levels through substitution of specific amounts of Sr ions.

Fine Tuning of Fluorene-Based Dye Structures for High-Efficiency p-Type Dye-Sensitized Solar Cells

2014 ◽  
Vol 6 (13) ◽  
pp. 10614-10622 ◽  
Author(s):  
Zonghao Liu ◽  
Wenhui Li ◽  
Sanjida Topa ◽  
Xiaobao Xu ◽  
Xianwei Zeng ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Fine Tuning ◽  
Dye Sensitized ◽  
P Type ◽  
Sensitized Solar Cells

scholarly journals High efficiency perovskite solar cells using DC sputtered compact TiO2 electron transport layer

2021 ◽  
Vol 12 ◽  
pp. 8
Author(s):  
Ahmed Hayali ◽  
Maan M. Alkaisi
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Dc Sputtering ◽  
Preparation Conditions ◽  
Dc Power ◽  
Sputtering Power ◽  
Electron Transporting Layer

High conductivity and transparency of the electron-transporting layer (ETL) is essential to achieve high efficiency perovskite solar cells (PvSCs). Generally, titanium dioxide (TiO2) has been extensively utilized as an ETL in PvSCs. Both surface roughness and uniformity of the compact-TiO2 (C-TiO2) can influence the efficiency of the PvSC. This work investigates the optimization of the direct current (DC) sputtering power and the ratio of argon (Ar) to oxygen (O2) plasma to achieve high quality ETL films. The effect of changing the DC sputtering power on the C-TiO2 films and subsequently on the overall efficiency was studied. The electrical and optical properties of the C-TiO2 layer were characterized for various DC powers and different ratios of Ar to O2 plasma. It was found that the optimum preparation conditions for the C-TiO2 films were obtained when the DC power was set at 200 W and a flow rate of 6 sccm Ar and 12 sccm O2. A power conversion efficiency (PCE) of 15.3% in forward sweep and 16.7% in reverse sweep were achieved under sunlight simulator of 100 mW/cm2. These results indicate that significant improvement in the efficiency can be achieved, by optimizing the C-TiO2 layer.

Nanostructured ternary perovskite oxides as photoconversion efficiency enhancers for DSSC

2022 ◽  
Author(s):  
Nandarapu Purushothamreddy ◽  
Rompivalasa Santhosh ◽  
Suresh Thogiti ◽  
Muniramaiah Reddivari ◽  
Paul Joseph ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Dye Sensitized Solar Cells ◽  
Perovskite Oxides ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Photoconversion Efficiency ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The ternary perovskite oxides are potential candidates as stand-in electron transport layer (ETL) materials to supersede the conventional binary TiO2 in dye-sensitized solar cells (DSSCs). Here, we report the synthesis...

Reveal the large open-circuit voltage deficit of all-inorganic CsPbIBr2 perovskite solar cells

2021 ◽  
Author(s):  
Ying Hu ◽  
Jiaping Wang ◽  
Peng Zhao ◽  
Zhenhua Lin ◽  
Siyu Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Perovskite Layer ◽  
Excellent Thermal Stability ◽  
Voltage Loss

Abstract Due to excellent thermal stability and optoelectronic properties, all-inorganic perovskite is one of the promising candidates to solve the thermal decomposition problem of conventional organic-inorganic hybrid perovskite solar cells (PSCs), but the larger voltage loss (V loss) cannot be ignored, especially CsPbIBr2, which limits the improvement of efficiency. To reduce the V loss, one promising solution is the modification of the energy level alignment between perovskite layer and adjacent charge transport layer (CTL), which can facilitate charge extraction and reduce carrier recombination rate at perovskite/CTL interface. Therefore, the key issues of minimum V loss and high efficiency of CsPbIBr2-based PSCs were studied in terms of the perovskite layer thickness, the effects of band offset of CTL/perovskite layer, the doping concentration of the CTL, and the electrode work function in this study based on device simulations. The open-circuit voltage (V oc) is increased from 1.37 V to 1.52 V by replacing SnO2 with ZnO as electron transport layer (ETL) due to more matching conduction band with CsPbIBr2 layer.

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