Publications de Amaresh Mishra

High Open Circuit Voltage for Perovskite Solar Cells with S,Si-Heteropentacene-Based Hole Conductors

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mohammad Ibrahim Dar, Amaresh Mishra, Neha Arora

High photovoltage in perovskite solar cells (PSCs) can be achieved by designing new hole transporting materials (HTMs) with relatively deeper energy levels of the highest occupied molecular orbital (HOMO). Here, we report on the synthesis of a new heteroac ...

WILEY-V C H VERLAG GMBH2018

High-Efficiency Perovskite Solar Cells Employing a S,N-Heteropentacene-based D-A Hole-Transport Material

Michael Graetzel, Dongqin Bi, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Peng Gao, Marius Franckevicius, Amaresh Mishra

We developed a new donor--acceptor-type hole-transport material (HTMs) incorporating S,N-heteropentacene as -spacer, triarylamine as donor, and dicyanovinylene as acceptor. In addition to appropriate frontier molecular orbital energies, the new HTM showed ...

Wiley-V C H Verlag Gmbh2016

Hole transporting and light absorbing material for solid state solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Peng Qin, Amaresh Mishra

The present invention relates to a compound of formula (I) based on compound derived from Acceptor-Donor-Acceptor (A-D-A) oligothiophenes based on heteroacene core and used as hole transporting material in a photovoltaic device, in particular in a solid st ...

2016

A-D-A-type S,N-heteropentacene-based hole transport materials for dopant-free perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Marius Franckevicius, Amaresh Mishra

This work reports the design and synthesis of acceptor-donor-acceptor (A-D-A) type low band gap hole transport materials (HTM) comprising S,N-heteropentacene central units for solid-state perovskite-based solar cells. The optical and electrochemical proper ...

Royal Society of Chemistry2015

A dopant-free spirobi[cyclopenta[2,1-b:3,4-b ']dithiophene] based hole-transport material for efficient perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jingshan Luo, Marius Franckevicius, Amaresh Mishra

We present the design and synthesis of a promising hole transporting material (HTM) using the 4,40-spirobi[cyclopenta[2,1-b: 3,4-b']dithiophene] derivative (spiro-CPDT) as the core and triarylamines as terminal units. The implementation of the new HTM in C ...

Royal Soc Chemistry2015

Low band gap S,N-heteroacene-based oligothiophenes as hole-transporting and light absorbing materials for efficient perovskite-based solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Peng Qin, Amaresh Mishra

Novel low band gap oligothiophenes incorporating S,N-heteropentacene central units were developed and used as hole-transport materials (HTMs) in solid-state perovskite-based solar cells. In addition to appropriate electronic energy levels, these materials ...

Royal Society of Chemistry2014

Significant Improvement of Dye-Sensitized Solar Cell Performance by Small Structural Modification in π-Conjugated Donor-Acceptor Dyes

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jacques-Edouard Moser, Robin Humphry-Baker, Joël Teuscher, Magdalena Anna Marszalek, Mateusz Barnaba Wielopolski, Amaresh Mishra

Two donor-π-acceptor (D-π-A) dyes are synthesized for application in dye- sensitized solar cells (DSSC). These D-π-A sensitizers use triphenylamine as donor, oligothiophene as both donor and π-bridge, and benzothiadiazole (BTDA)/cyanoacrylic acid as accept ...

Wiley-Blackwell2012

Click-Functionalized Ru(II) Complexes for Dye-Sensitized Solar Cells

Michael Graetzel, Paul Joseph Dyson, Shaik Mohammed Zakeeruddin, Nuttapol Pootrakulchote, Ryan Dykeman, Amaresh Mishra

Three heteroleptic ruthenium complexes incorporating new ancillary ligands synthesized by sequential connection of different alkyl functionalities with triazole as a linker are prepared using click chemistry. These sensitizers exhibit low-energy metal-to-l ...

Wiley-VCH Verlag Berlin2012

A Thiophene-Based Anchoring Ligand and Its Heteroleptic Ru(II)-Complex for Efficient Thin-Film Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mingkui Wang, Soo-Jin Moon, Nuttapol Pootrakulchote, Amaresh Mishra

A novel heteroleptic Ru-II complex (BTC-2) employing 5,5'-(2,2'-bipyridine-4,4'-diyl)-bis(thiophene-2-carboxylic acid) (BTC) as the anchoring group and 4,4'-dinonyl-2,2'-bipiridyl and two thiocyanates as ligands is prepared. The photovoltaic performance an ...

Wiley-Blackwell2011

"Click-chemistry" approach in the design of 1,2,3-triazolyl-pyridine ligands and their Ru(II)-complexes for dye-sensitized solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Soo-Jin Moon, Nuttapol Pootrakulchote, Amaresh Mishra

The synthesis of new 1,2,3-triazolyl-pyridine ligands via "click-chemistry" and their corresponding Ru(L)(2,2'-bipyridyl-4,4'-dicarboxylic acid)(NCS)(2) complexes (L = 1,2,3-triazolyl-pyridine) are presented. The complexes have been photophysically and ele ...

Royal Society of Chemistry2011