Interfacial engineering enables high efficiency with a high open-circuit voltage above 1.23 V in 2D perovskite solar cells

Abstract Interfacial engineering has made an outstanding contribution to the development of high-efficiency perovskite solar cells (PSCs). Here, we introduce an effective interface passivation strategy via methoxysilane molecules with different terminal groups. The power conversion efficiency (PCE) has increased from 20.97% to 21.97% after introducing a 3-isocyanatopropyltrimethoxy silane (IPTMS) molecule with carbonyl group, while a trimethoxy[3-(phenylamino)propyl] silane (PAPMS) molecule containing aniline group deteriorates the photovoltaic performance as a consequence of decreased open circuit voltage. The improved performance after IPTMS treatment is ascribed to the suppression of non-radiative recombination and enhancement of carrier transportation. In addition, the devices with carbonyl group modification exhibit outstanding thermal stability, which maintain 90% of its initial PCE after 1500 h exposure. This work provides a guideline for the design of passivation molecules aiming to deliver the efficiency and thermal stability simultaneously.

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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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Minimizing Open-Circuit voltage deficit via interface engineering for highly efficient CsPbI2Br perovskite solar cells

Chemical Engineering Journal ◽

10.1016/j.cej.2021.129247 ◽

2021 ◽

Vol 417 ◽

pp. 129247

Author(s):

Jing Li ◽

Jianming Yang ◽

Junjie Ma ◽

Jiwei Liang ◽

Yongjie Liu ◽

...

Keyword(s):

Solar Cells ◽

Open Circuit Voltage ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Interface Engineering ◽

Highly Efficient

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

Chinese Physics B ◽

10.1088/1674-1056/ac464b ◽

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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