Ecole Polytechnique Federale De Lausanne

Panasonic Corporation

Dow Global Technolgoies LLC

Aalto University Foundation

Solaronix S.a

Siemens Energy Global Gmbh & Co. Kg

Ecole Polytechnique Féderale De Lausanne (epfl)

Shaik Mohammed Zakeeruddin

Michael Graetzel

Maximilian Fleischer

Feifei Gao

Mohammad Khaja Nazeeruddin

Elfriede Simon

Peng Wang

Fabrizio Giordano

Xiong Li

Anders Hagfeldt

Michael Gratzel

Taisuke Matsui

Florian Kessler

Ivan Exnar

Michael Grätzel

Etienne Baranoff

Jing Zhang

David Martineau

Mingfei Xu

Peter Bäuerle

Kun Cao

Ladislav Kavan

Julian Burschka

Michael Saliba

Chenyi Yi

Syed Ghufran Hashmi

Hao Qin

Mingkui Wang

Henry J Snaith

Qing Wang

Zhixiang Zuo

Mohammad Ibrahim Dar

Dongqin Bi

Yuhang Liu

Jiyoun Seo

Norman Pellet

Jin Cui

Neha Arora

Konrad Domanski

Michael Bauer

Yan Shen

Wolfgang Richard Tress

Marina Freitag

Merve Ozkan

Yuan Wang

Seckin Akin

Hui-Seon Kim

Hong Zhang

The organic small molecule 4,4',4&#x2033;,4&#x2032;&#x2033;-(5,5-dimethoxycyclopenta-1,3-diene-1,2,3,4-tetrayl)tetrakis(N,N-bis(4-methoxyhenyl)aniline (CPDA 1), shows electrochemical properties very close to spiro-OMeTAD indicating a high compatibility with PSC systems for its use as a hole transport material (HTM). The implementation of the cyclopentadiene dimethyl acetale core helps to red shift the absorption onset of the films as well as provide a flexible spatial configuration of the molecule, which is essential for optimum film forming properties. Transient and steady state emission analysis as well as hole mobility measurements indicate that the new HTM allows a better charge extraction, transport and separation than the spiro-OMeTAD reference compound. PSCs based on the new CPDA 1 show a PCE close to 23% with lower hysteresis than its analogue. Stability studies performed under ambient, heated and humid conditions all showed that CPDA 1 is over-performing spiro-OMeTAD. Furthermore the production cost of CPDA 1 is about 10 times lower than that of spiro-OMeTAD, contributing to render PSCs more affordable.

Hole transport material, synthesis thereof, and solar cell

The invention relates to an optoelectronic and/or photoelectrochemical device including a conductive support layer, n-type semiconductor, a sensitizer or light-absorber layer, a hole transporting layer, a spacer layer and a back contact, wherein the n-type semiconductor is in contact with the sensitizer or light-absorber layer, the sensitizer or light-absorber layer includes a perovskite or metal halide perovskite material, the hole transporting layer is in direct contact with the sensitizer or light-absorber layer and includes an inorganic hole transporting material or inorganic p-type semiconductor, the spacer layer is between the hole transporting layer and the back contact and includes a material being different from the inorganic hole transporting material and the material of the back contact.

Inorganic hole conductor based perovskite photoelectric conversion device with high operational stability at long term

The present invention relates to a method for producing a solid state solar cell, including the steps of providing a conductive support layer or current collector, applying a metal oxide layer on the conducting support layer, applying at least one sensitizer layer onto the metal oxide layer or onto a first optional layer covering the metal oxide layer, the first optional layer including a charge transporting layer, applying a second optional layer onto the sensitizer layer, the second optional layer being selected from a charge transporting layer, a protective layer, or a combination of both layers, and providing a counter electrode or a metal electrode onto the sensitizer layer or the second optional layer. The at least one sensitizer layer includes an organic-inorganic or metal halide perovskite and is treated by the application of a vacuum before the annealing of the sensitizer.

High efficiency large area perovskite solar cells and process for producing the same

A perovskite material including an organic-inorganic perovskite structure of formula (I), AMX(I), n being the number of cation A and an integer &#x3e;4, A being a monovalent cation selected from inorganic cations Ai and/or from organic cations Ao, M being a divalent metal cation or a combination thereof, X being a halide and/or pseudohalide anion or a combination thereof, wherein at least one cation A is selected from organic cations Ao, the inorganic cations Ai are independently selected from Li, Na, K, Rb, Cs, or Tland the organic cations Ao are independently selected from ammonium (NH), methyl ammonium (MA) (CHNH), ethyl ammonium (CHCHNH), formamidinium (FA) (CH(NH)), methylformamidinium (CHC(NH)), guanidium (C((NH))), tetramethylammonium ((CH)N), dimethylammonium ((CH)NH) or trimethylammonium ((CH)NH).

Mixed cation perovskite solid state solar cell and fabrication thereof

The present invention provides a method for depositing an organic-inorganic perovskite, the method comprising the step of depositing a perovskite precursor solution comprising one or more organic cation, wherein said precursor solution preferably deposited by inkjet printing. The method is particularly useful in the manufacture of perovskite solar cells. For depositing the perovskite, a perovskite precursor solution or ink is preferably used, which comprises an organic cation carrying an anchoring group, such as 5-ammonium valeric acid. Surprisingly, the presence of the latter compound renders the precursor solutions stable and suitable for inkjet printing.

Method for inkjet printing an organic-inorganic perovskite

A photovoltaic system including a solar cell having a hysteretic behavior; and a power device configured to extract a maximum power from the solar cell by forcing power oscillations of the power output by the solar cell.

Device and method for performing maximum power point tracking for photovoltaic devices in presence of hysteresis

The invention relates to electrochemical devices comprising complexes of cobalt comprising at least one ligand with a 5- or six membered, N-containing heteroring. The complex are useful as p- and n-dopants, as over of electrochemical devices, in particular in organic semiconductors. The complexes are further useful as over-discharge prevention and overvoltage protection agents.

Metal complexes for use as dopants and other uses

The present invention relates to novel compounds that are useful as ligands in organometallic dyes. More particularly, the invention relates to dyes comprising the compounds, said dyes being sensitizing dyes useful in solar cell technology. According to an embodiment, the present invention discloses new ruthenium dyes and their application in dye-sensitized solar cells (DSC). The referred ruthenium dyes with new structural features can be easily synthesized, show more than 85% light-to-electricity conversion efficiency and a higher than 9% cell efficiency.

High molecular extinction coefficient metal dyes

The present invention relates to new organic sensitizer compounds and to photoelectric conversion devices, in particular dye-sensitised solar cells comprising the new sensitizers. The present invention also relates to flexible photoelectric conversion devices, which are based on ionic liquid electrolytes or organic charge transporting materials.

Organic sensitizers

This invention concerns a novel method for surface derivatization of electrode materials for Li-ion batteries. The derivatization is based on adsorption of a composite assembly consisting of amphiphilic redox active molecule attached to single walled carbon nanotube (SWCNT). Its role consists in the enhancement of electronic conductivity of electrode materials, such as phosphate olivines, without requesting any significant increase of the electrode volume and mass. The SWCNT is linked to the redox molecule via non-covalent or covalent interaction with the hydrophobic part of the molecule or electrostatic interaction. The hydrophilic part of the molecule serves as the anchoring site for surface modification of the electrode active material. The redox potential of the molecule is close to the redox potential of the electrode active material. The adsorbed assembly of redox-molecule & SWCNT thus improves the charge transfer from a current collector to the electrode active material.

Nanotube wiring

Growing community of inventors

Bussigny-Lausanne, Switzerland

Shaik Mohammed Zakeeruddin