A5038733509- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Molecular Junctions and Nanostructures
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Semiconductor materials and interfaces
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Silicon and Solar Cell Technologies
Institut Català d'Investigació Química
2011-2019
Shanghai Institute for Science of Science
2016-2019
Barcelona Institute for Science and Technology
2016-2019
Institute of Science and Technology
2016-2019
Observatori de l'Ebre
2015-2019
In this work, we assess the possible reasons for differences observed in open circuit voltage (<italic>V</italic><sub>OC</sub>) mixed cation perovskite solar cells when comparing four different hole transport materials (HTMs), namely <bold>TAE-1</bold>, <bold>TAE-3</bold>, <bold>TAE-4</bold> and <bold>spiro-OMeTAD</bold>.
In this work we study the different electrical loss pathways occurring during operation of bulk heterojunction solar cells by using a variety and optical characterization techniques beyond current density–voltage curve (J–V): Impedance Spectroscopy (IS), Charge Extraction (CE) Transient Photovoltage (TPV). Two sets devices are analyzed: first is based on donor polymer P3HT, known to provide efficient thick active layers (i.e. 270 nm), recently developed PTB7 which offers maximum efficiencies...
We report the synthesis and characterisation of tetra{4-[N,N-(4,4'-dimethoxydiphenylamino)]phenyl}ethene () as an efficient robust hole transport material for its application in methyl ammonium lead iodide (MAPI) perovskite solar cells. The cells show light-to-energy conversion efficiencies high 11.0% under standard measurement conditions without need additional dopants.
We analyze the voltage losses at open circuit in solution-processed, small-molecule:fullerene blend solar cells, using electroluminescence and external quantum efficiency measurements reciprocity relationship between light absorption emission. For cells made from oligo-thienylenevinylene-based donors phenyl-C71 butyric acid methyl ester (PC71BM), we find that loss due to finite breadth of edge is remarkably small, less than 0.01 eV best cases, while nonradiative recombination reaches 0.29...
Fully solution-processed direct perovskite solar cells with a planar junction are realized by incorporating cross-linked [6,6]-phenyl-C61-butyric styryl dendron ester layer as an electron extracting layer. Power conversion efficiencies close to 19% and open-circuit voltage exceeding 1.1 V negligible hysteresis delivered. A film superb optoelectronic qualities is grown, which reduces carrier recombination losses hence increases oc. As service our authors readers, this journal provides...
In this work, we analyze the carrier recombination kinetics and associated charge density in methylammonium lead iodide perovskite (MAPI) solar cells that use mesoporous TiO2 as selective contact (m-MAPI) flat (without TiO2, f-MAPI), which are most common device architectures for cells. The of PIT-PV (photoinduced transient photovoltage) L-TAS (laser absorption spectroscopy) showed devices cannot reach efficiencies close to 19% there is a slow component photovoltage decay corresponds pathway...
Abstract A series of three small‐molecule acceptor–donor–acceptor (A‐D‐A) compounds with a tetraaryl‐1,4‐dihydropyrrolo[3,2‐ b ]pyrrole as the central building block were synthesized and fully characterized. These molecules present high thermal stability suitable HOMO–LUMO energy levels making them feasible electron‐donor materials in bulk heterojunction organic solar cells (BHJ‐OSC). Moreover, theoretical work predicts lack planarity no π–π stacking, furthermore. The electron density HOMO...
The crystalline phase in donor domains of squaraine-based small molecule (SM) solution processed organic solar cell (OSC) devices has been accurately characterized. active layers consisting bulk-heterojunction (BHJ) films squaraine (SQ)-PC70BM blends and pristine SQ thin were characterized using a set X-ray diffraction techniques, simple sample preparation methods, routine least-square data refinement. approach involves comparing experimental diffractograms recorded from powdered with those...
1-Dimensional nanostructured ZnO electrodes have been demonstrated to be potentially interesting for their application in solar cells. Herein, we present a novel procedure control the nanowire optoelectronic properties by means of surface modification. The is functionalized with nanoparticles order provide an improved contact photoactive P3HT:PCBM film that enhances overall power conversion efficiency resulting cell. Charge extraction and transient photovoltage measurements used successfully...
We describe how the use of photo-induced charge extraction technique can be useful to study and understand relationship between perovskite composition, ion reorganization process solar cell efficiency.
We have fabricated MAPI solar cells using as selective contacts PEDOT:PSS polymer for holes and PCBM-C70 fullerene derivative electrons. The thickness of MAPI, PCBM-C70, layers has been varied in order to evaluate the contribution each layer final device performance. measured devices capacitance under illumination charge carrier's lifetime photoinduced time-resolved techniques. results show that this kind limiting is due its relative reduced mobility compared makes control crucial...
A set of five novel oligo-thienylenevinylene organic molecules have been synthesized and characterized for use as electron donor moieties in bulk-heterojunction solution-processed solar cells combined with PC<sub>71</sub>BM an acceptor.
Two new planar and symmetrical A-D-A (electron acceptor-electron donor-electron acceptor) small molecules based on a commercial cyclopentadithiophene derivative have been synthesized for solution processed molecule organic solar cells. The aim was to synthesise the be energetically identical (similar HOMO-LUMO energy levels) in order assign differences observed changes film morphology or interfacial recombination kinetics both. Devices were electrically characterized under one sun simulated...
Correction for ‘High photocurrent in oligo-thienylenevinylene-based small molecule solar cells with 4.9% solar-to-electrical energy conversion’ by Núria F. Montcada <italic>et al.</italic>, <italic>J. Mater. Chem. A</italic>, 2015, DOI: 10.1039/c5ta01632k.