Publications de Mohammad Mahdi Tavakoli

Highly efficient, stable and hysteresis-less planar perovskite solar cell based on chemical bath treated Zn2SnO4 electron transport layer

Michael Graetzel, Ulf Anders Hagfeldt, Wolfgang Richard Tress, Zaiwei Wang, Mohammad Mahdi Tavakoli, Seckin Akin, Faranak Sadegh, Marco Alejandro Ruiz Preciado

The electron transport layer (ETL) is a key constituent in perovskite solar cells (PSCs). It should provide efficient and selective electron extraction, low resistivity and high stability. Here, zinc stannate (Zn2SnO4, ZSO) is employed as an ETL in planar ...

Elsevier2020

Suppressing recombination in perovskite solar cells via surface engineering of TiO2 ETL

Michael Graetzel, Shaik Mohammed Zakeeruddin, Manoj Kumar, Pankaj Kumar Yadav, Daniel Prochowicz, Mohammad Mahdi Tavakoli

Hybrid perovskite solar cells (PSCs) have gained significant attention owing to their excellent physicochemical and photovoltaic properties. PSCs typically consist of a perovskite light absorber sandwiched between two carrier selective layers optimized wit ...

PERGAMON-ELSEVIER SCIENCE LTD2020

Engineering of Perovskite Materials Based on Formamidinium and Cesium Hybridization for High-Efficiency Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Dominik Józef Kubicki, Pankaj Kumar Yadav, Daniel Prochowicz, Anwar Qasem M Alanazi, Mohammad Mahdi Tavakoli, Rashmi Runjhun

Engineering the chemical composition of inorganic-organic hybrid perovskite materials is an effective strategy to boost the performance and operational stability of perovskite solar cells (PSCs). Among the diverse family of ABX(3) perovskites, methylammoni ...

AMER CHEMICAL SOC2019

Electron specific oxide double layer contacts for highly efficient and uv stable perovskite device

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mohammad Mahdi Tavakoli

The present invention relates to an optoelectronic device comprising an electron transport layer (ETL) and a light harvesting layer, wherein the light harvesting layer comprises a metal halide perovskite and is provided on the ETL being a multilayer struct ...

2019

Synergistic Crystal and Interface Engineering for Efficient and Stable Perovskite Photovoltaics

Michael Graetzel, Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Michael Saliba, Philippe Jürgen Holzhey, Pankaj Kumar Yadav, Mohammad Mahdi Tavakoli

The presence of bulk and surface defects in perovskite light harvesting materials limits the overall efficiency of perovskite solar cells (PSCs). The formation of such defects is suppressed by adding methylammonium chloride (MACl) as a crystallization aid ...

WILEY-V C H VERLAG GMBH2019

Charge Accumulation, Recombination, and Their Associated Time Scale in Efficient (GUA)(x)(MA)(1-x)PbI3-Based Perovskite Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Pankaj Kumar Yadav, Daniel Prochowicz, Anwar Qasem M Alanazi, Mohammad Mahdi Tavakoli

Here, we study the influence of guanidinium (GUA) ions on the open-circuit voltage (V-oc) in the (GUA)(x)(MA)(1-x)PbI3 based perovskite solar cells. We demonstrate that incorporation of GUA forms electronic and ionic accumulation regions at the interface o ...

2019

Crystal defects mitigating agents for high power conversion efficiency and stability of perovskite photovoltaic devices

Michael Graetzel, Shaik Mohammed Zakeeruddin, Yuhang Liu, Mohammad Mahdi Tavakoli

This invention relates to an optoelectronic and/or photovoltaic device comprising acompound used as crystal defect mitigating agent or passivating agent, said compound beingselected from a compound of formula (I),a compound of formula (II),a mixture thereo ...

2019

Understanding the effect of chlorobenzene and isopropanol anti-solvent treatments on the recombination and interfacial charge accumulation in efficient planar perovskite solar cells

Michael Saliba, Pankaj Kumar Yadav, Daniel Prochowicz, Mohammad Mahdi Tavakoli

Organic-inorganic lead halide perovskites have emerged as very promising semiconductors with efficiencies exceeding 22% making them a serious candidate for next generation solar cells. All current high performance perovskite solar cells (PSCs), including t ...

Royal Society of Chemistry2018

Addition of adamantylammonium iodide to hole transport layers enables highly efficient and electroluminescent perovskite solar cells

Michael Graetzel, Dominik Józef Kubicki, Wolfgang Richard Tress, David Lyndon Emsley, Mohammad Mahdi Tavakoli, Jovana Milic

The efficiency of perovskite solar cells (PSCs) is currently limited by non-radiative recombination losses. One potential loss channel consists of electrons recombining at the interface with the hole transport layer (HTL). We synthesized adamantylammonium ...

ROYAL SOC CHEMISTRY2018

Greener, Nonhalogenated Solvent Systems for Highly Efficient Perovskite Solar Cells

Michael Graetzel, Ulf Anders Hagfeldt, Michael Saliba, Silver Hamill Turren Cruz, Mozhgan Yavari, Mohammad Mahdi Tavakoli

All current highest efficiency perovskite solar cells (PSCs) use highly toxic, halogenated solvents, such as chlorobenzene (CB) or toluene (TLN), in an antisolvent step or as solvent for the hole transporter material (HTM). A more environmentally friendly ...

WILEY-V C H VERLAG GMBH2018

Adamantanes Enhance the Photovoltaic Performance and Operational Stability of Perovskite Solar Cells by Effective Mitigation of Interfacial Defect States

Shaik Mohammed Zakeeruddin, Dongqin Bi, Linfeng Pan, Mohammad Mahdi Tavakoli

2018

Elucidation of Charge Recombination and Accumulation Mechanism in Mixed Perovskite Solar Cells

Shaik Mohammed Zakeeruddin, Michael Saliba, Pankaj Kumar Yadav, Daniel Prochowicz, Silver Hamill Turren Cruz, Mohammad Mahdi Tavakoli

2018

Large-Grain Tin-Rich Perovskite Films for Efficient Solar Cells via Metal Alloying Technique

Shaik Mohammed Zakeeruddin, Mohammad Mahdi Tavakoli

Wiley2018

Mesoscopic Oxide Double Layer as Electron Specific Contact for Highly Efficient and UV Stable Perovskite Photovoltaics

Shaik Mohammed Zakeeruddin, Fabrizio Giordano, Mohammad Mahdi Tavakoli

American Chemical Society (ACS)2018

One-step mechanochemical incorporation of an insoluble cesium additive for high performance planar heterojunction solar cells

Shaik Mohammed Zakeeruddin, Dominik Józef Kubicki, David Lyndon Emsley, Michael Saliba, Pankaj Kumar Yadav, Daniel Prochowicz, Mohammad Mahdi Tavakoli

Elsevier2018

Reducing Surface Recombination by a Poly(4-vinylpyridine) Interlayer in Perovskite Solar Cells with High Open-Circuit Voltage and Efficiency

Wolfgang Richard Tress, Mozhgan Yavari, Mohammad Mahdi Tavakoli

2018

Interface Engineering of Perovskite Solar Cell Using a Reduced-Graphene Scaffold

Soheil Hasanzadeh, Mohammad Mahdi Tavakoli

Interface engineering of solar cell device is a prominent strategy to improve the device performance. Herein, we synthesize reduced-graphene scaffold (rGS) by using a new and simple chemical approach. In this regard, we synthesize 4 hollow structure of gra ...

Amer Chemical Soc2016