Surface engineering of ZnO electron transporting layer via Al doping for high efficiency planar perovskite solar cells

Perovskite solar cells have been attracted as new representatives for the third-generation photovoltaic devices. Simple strategies for high efficiency with the long-term stability of solar cells are the challenges for commercial solar cell technology. Another challenge of the development toward industrial scale in perovskite solar cells is the production under the ambient and high humidity. In this sense, we successfully fabricated perovskite solar cells via solution depositions of all layers under ambient air with a relative humidity above 50%. Titanium dioxide (TiO2) nanoparticles with the roles for efficient charge extraction and electron transportation properties were used as an electron-transporting layer in the cell fabrication. The modification of TiO2 nanoparticles for energy band adjustment was done by doping with nontoxic cadmium sulfide (CdS) quantum dots. With the variation of CdS concentrations, energy band is not only changeable, but the enhancement of the perovskite solar cells efficiency could be achieved compared with the conventional cells made of pristine-TiO2 film and TiO2 nanoparticles.

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Lattice-tailored low-temperature processed electron transporting materials boost the open-circuit voltage of planar CsPbBr3 perovskite solar cells up to 1.654 V

Journal of Materials Chemistry A ◽

10.1039/d0ta04366d ◽

2020 ◽

Vol 8 (23) ◽

pp. 11859-11866 ◽

Cited By ~ 3

Author(s):

Yafeng Xu ◽

Jialong Duan ◽

Xiya Yang ◽

Jian Du ◽

Yudi Wang ◽

...

Keyword(s):

Solar Cells ◽

Low Temperature ◽

High Efficiency ◽

Open Circuit Voltage ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Solar Irradiation ◽

Electron Transporting Layer ◽

Charge Extraction

The electron-transporting layer (ETL) plays a non-negligible role in determining the charge extraction and transfer behaviors from perovskite films under solar irradiation for high efficiency perovskite solar cells.

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Room‐Temperature‐Processed Fullerene/TiO 2 Nanocomposite Electron Transporting Layer for High‐Efficiency Rigid and Flexible Planar Perovskite Solar Cells

Solar RRL ◽

10.1002/solr.202000247 ◽

2020 ◽

Vol 4 (10) ◽

pp. 2000247

Author(s):

Ping-Cheng Wang ◽

Venkatesan Govindan ◽

Chien-Hung Chiang ◽

Chun-Guey Wu

Keyword(s):

Solar Cells ◽

Room Temperature ◽

High Efficiency ◽

Perovskite Solar Cells ◽

Electron Transporting Layer

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

EPJ Photovoltaics ◽

10.1051/epjpv/2021008 ◽

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.

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Surface Engineering of ZnO Thin Film for High Efficiency Planar Perovskite Solar Cells

Scientific Reports ◽

10.1038/srep13211 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 109

Author(s):

Zong-Liang Tseng ◽

Chien-Hung Chiang ◽

Chun-Guey Wu

Keyword(s):

Thin Film ◽

Solar Cells ◽

Surface Engineering ◽

High Efficiency ◽

Perovskite Solar Cells ◽

Zno Thin Film

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Enhancing Perovskite Solar Cell Performance through Surface Engineering of Metal Oxide Electron-Transporting Layer

Coatings ◽

10.3390/coatings10010046 ◽

2020 ◽

Vol 10 (1) ◽

pp. 46 ◽

Cited By ~ 2

Author(s):

Gang Lu ◽

Xuhui Wang ◽

Juan Du ◽

Min Zhang ◽

Yali Gao ◽

...

Keyword(s):

Solar Cells ◽

Metal Oxide ◽

Surface Engineering ◽

Perovskite Solar Cells ◽

Device Performance ◽

Solar Cell Performance ◽

Ticl4 Treatment ◽

Device Efficiency ◽

Electron Transporting Layer ◽

Metal Oxide Layer

Perovskite solar cells have gained increasing interest in recent times owing to the rapidly enlarged device efficiency and tunable optoelectronic properties in various applications. In perovskite solar cells, interface engineering plays an important role in determining the final device efficiency and stability. In this study, we adopted TiCl4 treatment to reduce the surface roughness of the metal oxide layer and improve the perovskite film quality to obtain better device performance. After proper TiCl4 treatment, the efficiencies of TiCl4–TiO2- and TiCl4–ZnO-based devices were significantly enhanced up to 16.5% and 17.0%, respectively, compared with those based on pristine TiO2 and ZnO (13.2% and 10.2%, respectively).

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