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Terbium-Doped and Dual-Passivated gamma-CsPb(I1-xBrx)(3) Inorganic Perovskite Solar Cells with Improved Air Thermal Stability and High Efficiency

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State-of-the-art halide perovskite solar cells employ semiconductor oxides as electron transportmaterials. Defects in these oxides, such as oxygen vacancies (Ovac), act as recombination centres and, in air and UV light, reduce the stability of the solar ce ...

ROYAL SOC CHEMISTRY2019

Dopant-Free Hole-Transporting Polymers for Efficient and Stable Perovskite Solar Cells

Shaik Mohammed Zakeeruddin, Wolfgang Richard Tress, Michael Saliba

A series of novel polymers (P1P6) derived from the combination of different units (including thiophene, triarylamine, and spirobifluorene) were successfully synthesized, completely characterized, and used as hole-transporting materials (HTMs) for perovskit ...

AMER CHEMICAL SOC2019

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Hybrid perovskite solar cells have attracted tremendous interest in the photovoltaic community. Despite their high defect tolerance, reducing the trap density by material engineering and surface modification is still critical to further boost performance. ...

2019

Perovskite Solar Cells on the Way to Their Radiative Efficiency Limit - Insights Into a Success Story of High Open-Circuit Voltage and Low Recombination

Wolfgang Richard Tress

Inorganic-organic lead-halide perovskite solar cells have reached efficiencies above 22% within a few years of research. Achieved photovoltages of >1.2 V are outstanding for a material with a bandgap of 1.6 eV - in particular considering that it is solutio ...

Wiley-V C H Verlag Gmbh2017

Elucidating the role of chlorine in perovskite solar cells

Gang Wang, Ulf Anders Hagfeldt, Jingshan Luo, Xiaoyu Zhang, Yi Ding, Di Zhang, Li Fan

It has been proposed that introducing the chlorine anion into a CH3NH3PbI3 perovskite material can substantially improve the materials properties as well as the solar cell performance. To elucidate the role of chlorine in perovskite solar cells (PSCs), her ...

Royal Society of Chemistry2017

Investigations on hybrid organic-inorganic perovskites for high performance solar cells

Norman Pellet

Undoubtedly, perovskite solar cells have become a key player in 3rd generation photovoltaics over the last few years. Although it is only in 2012 that the first solid state perovskite solar cell was reported, power conversion efficiencies have increased so ...

EPFL2017

Deep level trapped defect analysis in CH3NH3PbI3 perovskite solar cells by deep level transient spectroscopy

Mohammad Khaja Nazeeruddin, Yonghui Lee

We report the presence of defects in CH3NH3PbI3, which is one of the main factors that deteriorates the performance of perovskite solar cells. Although the efficiency of the perovskite solar cells has been improved by curing defects using various methods, ...

Royal Soc Chemistry2017

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Functionalized imidazolium iodide salts (ionic liquids) modified with -CH2-CH=CH2, -CH2C equivalent to CH, or -CH2C equivalent to N groups are applied as dopants in the synthesis of CH3NH3PbI3-type perovskites together with a fumigation step. Notably, a so ...

Wiley-Blackwell2017

Microscopic Analysis of Inherent Void Passivation in Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Yonghui Lee

The presence of voids in perovskite solar cells influences the efficiency because of accelerated charge recombination. The induced electric field near voids due to band bending attracts photogenerated electrons and holes toward the voids, leading to carrie ...

Amer Chemical Soc2017

Interfacial Kinetics of Efficient Perovskite Solar Cells

Shaik Mohammed Zakeeruddin, Michael Saliba, Pankaj Kumar Yadav, Daniel Prochowicz

Perovskite solar cells (PSCs) have immense potential for high power conversion efficiency with an ease of fabrication procedure. The fundamental understanding of interfacial kinetics in PSCs is crucial for further improving of their photovoltaic performanc ...

2017