Use of Ultrafast Time-Resolved Spectroscopy to Demonstrate the Effect of Annealing on the Performance of P3HT:PCBM Solar Cells

2015 ◽  
Vol 7 (8) ◽  
pp. 4457-4462 ◽  
Author(s):  
Yu-Ting Wang ◽  
Mei-Hsin Chen ◽  
Chao-Ting Lin ◽  
Jian-Jhih Fang ◽  
Che-Jui Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Time-resolved spectroscopy of charge transfer phenomena in organic solar cells

2015 ◽  
Author(s):  
Marina Gerhard ◽  
Andreas Arndt ◽  
Aina Quintilla ◽  
Arash Rahimi-Iman ◽  
Uli Lemmer ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Insights into the limitations of solar cells sensitized with ruthenium dyes revealed in time-resolved spectroscopy studies

2017 ◽  
Vol 19 (31) ◽  
pp. 20463-20473 ◽  
Author(s):  
Mateusz Gierszewski ◽  
Iwona Grądzka ◽  
Adam Glinka ◽  
Marcin Ziółek
Keyword(s):  
Solar Cells ◽  
Conduction Band ◽  
Time Scale ◽  
Electron Recombination ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Spectroscopy Studies ◽  
Ruthenium Dyes

An important limitation in the photocurrent of solar cells sensitized with Ru dyes and filled with cobalt electrolyte is electron recombination between titania conduction band (CB) and oxidized dyes, which occurs on the sub-ns time scale.

A study of Ce3+ to Mn2+ energy transfer in high transmission glasses using time-resolved spectroscopy

2016 ◽  
Vol 4 (38) ◽  
pp. 9021-9026 ◽  
Author(s):  
Susana Gómez-Salces ◽  
Jose Antonio Barreda-Argüeso ◽  
Rafael Valiente ◽  
Fernando Rodríguez
Keyword(s):  
Energy Transfer ◽  
Solar Cells ◽  
Solar Spectrum ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
High Transmission

This work investigates the energy transfer from Ce3+ to Mn2+ in high transmission glass (HTG) doped with CeO2 and MnO through time-resolved spectroscopy to transform the solar spectrum into a more efficient red-enhanced spectrum for traditional Si-based solar cells.

scholarly journals Activating intramolecular singlet exciton fission by altering π-bridge flexibility in perylene diimide trimers for organic solar cells

2020 ◽  
Vol 11 (33) ◽  
pp. 8757-8770
Author(s):  
Benedetta Carlotti ◽  
Ifeanyi K. Madu ◽  
Hyungjun Kim ◽  
Zhengxu. Cai ◽  
Hanjie Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Perylene Diimide ◽  
Intersystem Crossing ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Singlet Exciton ◽  
Singlet Exciton Fission ◽  
Triplet Formation

We show via time resolved spectroscopy that triplet formation proceeds via intersystem crossing in a rigid-bridged perylene diimide trimer and via efficient and fast intramolecular singlet exciton fission in the analogous flexible-bridged trimer.

scholarly journals Effects of 5-Ammonium Valeric Acid Iodide as Additive on Methyl Ammonium Lead Iodide Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2512
Author(s):  
Daming Zheng ◽  
Changheng Tong ◽  
Tao Zhu ◽  
Yaoguang Rong ◽  
Thierry Pauporté
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Single Crystal Silicon ◽  
Mesoporous Structure ◽  
Valeric Acid ◽  
Electrical Impedance Spectroscopy ◽  
Lead Iodide ◽  
Crystal Silicon ◽  
Time Resolved ◽  
Hole Transporting

During the past decade, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen rapidly, and it now approaches the record for single crystal silicon solar cells. However, these devices still suffer from a problem of stability. To improve PSC stability, two approaches have been notably developed: the use of additives and/or post-treatments that can strengthen perovskite structures and the use of a nontypical architecture where three mesoporous layers, including a porous carbon backcontact without hole transporting layer, are employed. This paper focuses on 5-ammonium valeric acid iodide (5-AVAI or AVA) as an additive in methylammonium lead iodide (MAPI). By combining scanning electron microscopy (SEM), X-ray diffraction (XRD), time-resolved photoluminescence (TRPL), current–voltage measurements, ideality factor determination, and in-depth electrical impedance spectroscopy (EIS) investigations on various layers stacks structures, we discriminated the effects of a mesoscopic scaffold and an AVA additive. The AVA additive was found to decrease the bulk defects in perovskite (PVK) and boost the PVK resistance to moisture. The triple mesoporous structure was detrimental for the defects, but it improved the stability against humidity. On standard architecture, the PCE is 16.9% with the AVA additive instead of 18.1% for the control. A high stability of TiO2/ZrO2/carbon/perovskite cells was found due to both AVA and the protection by the all-inorganic scaffold. These cells achieved a PCE of 14.4% in the present work.

scholarly journals Photophysical properties and fluorosolvatochromism of D–π–A thiophene based derivatives

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43459-43471
Author(s):  
Hussain A. Z. Sabek ◽  
Ahmed M. M. Alazaly ◽  
Dina Salah ◽  
Hesham S. Abdel-Samad ◽  
Mohamed A. Ismail ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Fluorescence Emission ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Solvation Models

Solvation-dependent photophysical properties of two push–pull thiophene-based compounds with donor–π–acceptor (D–π–A) structures were investigated using absorption, fluorescence emission and time resolved spectroscopy, and supported by different solvation models.

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