Energy transfer within small molecule/conjugated polymer blends enhances photovoltaic efficiency

2017 ◽  
Vol 5 (34) ◽  
pp. 18053-18063 ◽  
Author(s):  
Yu-Che Lin ◽  
Yu-Wei Su ◽  
Jia-Xing Li ◽  
Bo-Hsien Lin ◽  
Chung-Hao Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Polymer Blends ◽  
Small Molecule ◽  
Conjugated Polymer ◽  
Ternary Blends ◽  
Photovoltaic Devices ◽  
Single Junction ◽  
Photovoltaic Efficiency ◽  
Active Layers

We employed ternary blends capable of energy transfer—a synthesized small molecule (SM-4OMe) comprising benzodithiophene (BDT) units (a molecule designed for energy transfer), and a polymer (PTB7-TH) with BDT units with desired packing orientation, and a fullerene—as active layers for single junction photovoltaic devices.

Nanostructured Photovoltaic Devices from Thermally-Reactive π-Conjugated Polymer Blends

2009 ◽  
Vol 21 (19) ◽  
pp. 4631-4637 ◽  
Author(s):  
Xu Han ◽  
Xiwen Chen ◽  
Steven Holdcroft
Keyword(s):  
Polymer Blends ◽  
Conjugated Polymer ◽  
Photovoltaic Devices

scholarly journals Improving the Photostability of Small-Molecule-Based Organic Photovoltaics by Providing a Charge Percolation Pathway of Crystalline Conjugated Polymer

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2598
Author(s):  
Jihee Kim ◽  
Chang Woo Koh ◽  
Mohammad Afsar Uddin ◽  
Ka Yeon Ryu ◽  
Song-Rim Jang ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Conjugated Polymer ◽  
Bulk Heterojunction ◽  
Hole Mobility ◽  
Chemical Structures ◽  
Active Layers ◽  
Similar Chemical ◽  
A Charge ◽  
Soaking Test

Photostability of small-molecule (SM)-based organic photovoltaics (SM-OPVs) is greatly improved by utilizing a ternary photo-active layer incorporating a small amount of a conjugated polymer (CP). Semi-crystalline poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2FBT) and amorphous poly[(2,5-bis(2-decyltetradecyloxy)phenylene)-alt-(5,6-dicyano-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2CNBT) with similar chemical structures were used for preparing SM:fullerene:CP ternary photo-active layers. The power conversion efficiency (PCE) of the ternary device with PPDT2FBT (Ternary-F) was higher than those of the ternary device with PPDT2CNBT (Ternary-CN) and a binary SM-OPV device (Binary) by 15% and 17%, respectively. The photostability of the SM-OPV was considerably improved by the addition of the crystalline CP, PPDT2FBT. Ternary-F retained 76% of its initial PCE after 1500 h of light soaking, whereas Ternary-CN and Binary retained only 38% and 17% of their initial PCEs, respectively. The electrical and morphological analyses of the SM-OPV devices revealed that the addition of the semi-crystalline CP led to the formation of percolation pathways for charge transport without disturbing the optimized bulk heterojunction morphology. The CP also suppressed trap-assisted recombination and enhanced the hole mobility in Ternary-F. The percolation pathways enabled the hole mobility of Ternary-F to remain constant during the light-soaking test. The photostability of Ternary-CN did not improve because the addition of the amorphous CP inhibited the formation of ordered SM domains.

Förster energy transfer mechanism and color tunability in three binary conjugated polymer blends

2021 ◽  
Vol 116 ◽  
pp. 111085
Author(s):  
Sameer Al-Bati ◽  
Mohammad Hafizuddin Hj Jumali ◽  
Khatatbeh Ibtehaj ◽  
Bandar Ali Al-Asbahi ◽  
Chi Chin Yap
Keyword(s):  
Energy Transfer ◽  
Polymer Blends ◽  
Conjugated Polymer ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
Förster Energy Transfer ◽  
Color Tunability

Light-Induced Degradation in Solar Cells with Hydrogenated Amorphous Silicon-Sulfur Active Layers

2002 ◽  
Vol 715 ◽  
Author(s):  
Wei Xu ◽  
P. C. Taylor
Keyword(s):  
Solar Cells ◽  
Practical Importance ◽  
Chemical Vapor ◽  
Photovoltaic Devices ◽  
Sulfur Concentration ◽  
Active Layers ◽  
Conversion Efficiencies ◽  
Hydrogenated Amorphous ◽  
Secondary Ion ◽  
Initial Conversion

AbstractWe have made a series of a-SiSx:H based solar cells, with a pin structure, in a multichamber plasma enhanced chemical vapor deposition (PECVD) system. The sulfur concentration ranges from zero to 5 x 1018 cm-3 as measured by secondary ion mass spectroscopy. The initial conversion efficiencies of cells in this series with sulfur concentrations ≤ 1018 cm-3 are approximately 7%. The time constants for degradation increase with increasing sulfur concentration, but not fast enough to be of practical importance in photovoltaic devices.

A Small Molecule – Protein Hybrid for Voltage Imaging via Quenching of Bioluminescence

2020 ◽  
Author(s):  
Brittany Benlian ◽  
Pavel Klier ◽  
Kayli Martinez ◽  
Marie Schwinn ◽  
Thomas Kirkland ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Membrane Potential ◽  
Small Molecule ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Live Cells ◽  
Potential Oscillations ◽  
Excitation Light ◽  
Voltage Imaging ◽  
Induced Pluripotent

<p>We report a small molecule enzyme pair for optical voltage sensing via quenching of bioluminescence. This <u>Q</u>uenching <u>B</u>ioluminescent V<u>olt</u>age Indicator, or Q-BOLT, pairs the dark absorbing, voltage-sensitive dipicrylamine with membrane-localized bioluminescence from the luciferase NanoLuc (NLuc). As a result, bioluminescence is quenched through resonance energy transfer (QRET) as a function of membrane potential. Fusion of HaloTag to NLuc creates a two-acceptor bioluminescence resonance energy transfer (BRET) system when a tetramethylrhodamine (TMR) HaloTag ligand is ligated to HaloTag. In this mode, Q-BOLT is capable of providing direct visualization of changes in membrane potential in live cells via three distinct readouts: change in QRET, BRET, and the ratio between bioluminescence emission and BRET. Q-BOLT can provide up to a 29% change in bioluminescence (ΔBL/BL) and >100% ΔBRET/BRET per 100 mV change in HEK 293T cells, without the need for excitation light. In cardiac monolayers derived from human induced pluripotent stem cells (hiPSC), Q-BOLT readily reports on membrane potential oscillations. Q-BOLT is the first example of a hybrid small molecule – protein voltage indicator that does not require excitation light and may be useful in contexts where excitation light is limiting.</p> <p> </p>

A Small Molecule – Protein Hybrid for Voltage Imaging via Quenching of Bioluminescence

2020 ◽  
Author(s):  
Brittany Benlian ◽  
Pavel Klier ◽  
Kayli Martinez ◽  
Marie Schwinn ◽  
Thomas Kirkland ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Membrane Potential ◽  
Small Molecule ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Live Cells ◽  
Potential Oscillations ◽  
Excitation Light ◽  
Voltage Imaging ◽  
Induced Pluripotent

<p>We report a small molecule enzyme pair for optical voltage sensing via quenching of bioluminescence. This <u>Q</u>uenching <u>B</u>ioluminescent V<u>olt</u>age Indicator, or Q-BOLT, pairs the dark absorbing, voltage-sensitive dipicrylamine with membrane-localized bioluminescence from the luciferase NanoLuc (NLuc). As a result, bioluminescence is quenched through resonance energy transfer (QRET) as a function of membrane potential. Fusion of HaloTag to NLuc creates a two-acceptor bioluminescence resonance energy transfer (BRET) system when a tetramethylrhodamine (TMR) HaloTag ligand is ligated to HaloTag. In this mode, Q-BOLT is capable of providing direct visualization of changes in membrane potential in live cells via three distinct readouts: change in QRET, BRET, and the ratio between bioluminescence emission and BRET. Q-BOLT can provide up to a 29% change in bioluminescence (ΔBL/BL) and >100% ΔBRET/BRET per 100 mV change in HEK 293T cells, without the need for excitation light. In cardiac monolayers derived from human induced pluripotent stem cells (hiPSC), Q-BOLT readily reports on membrane potential oscillations. Q-BOLT is the first example of a hybrid small molecule – protein voltage indicator that does not require excitation light and may be useful in contexts where excitation light is limiting.</p> <p> </p>

Anomalous Energy Transfer Dynamics due to Torsional Relaxation in a Conjugated Polymer

2006 ◽  
Vol 97 (16) ◽  
Author(s):  
Sebastian Westenhoff ◽  
Wichard J. D. Beenken ◽  
Richard H. Friend ◽  
Neil C. Greenham ◽  
Arkady Yartsev ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Conjugated Polymer

scholarly journals Down-Shifting in the YAM: Ce3+ + Yb3+ System for Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2753
Author(s):  
Bartosz Fetliński ◽  
Sebastian Turczyński ◽  
Michał Malinowski ◽  
Paweł Szczepański
Keyword(s):  
Energy Transfer ◽  
Emission Intensity ◽  
Potential Application ◽  
Single Photon ◽  
Solar Spectrum ◽  
Excitation Power ◽  
Photovoltaic Devices ◽  
Photoluminescence Properties ◽  
System A ◽  
Down Conversion

In this work, we investigate Ce3+ to Yb3+ energy transfer in Y4Al2O9 (YAM) for potential application in solar spectrum down-converting layers for photovoltaic devices. Photoluminescence properties set, of 10 samples, of the YAM host activated with Ce3+ and Yb3+ with varying concentrations are presented, and the Ce3+ to Yb3+ energy transfer is proven. Measurement of highly non-exponential luminescence decays of Ce3+ 5d band allowed for the calculation of maximal theoretical quantum efficiency, of the expected down-conversion process, equal to 123%. Measurements of Yb3+ emission intensity, in the function of excitation power, confirmed the predominantly single-photon downshifting character of Ce3+ to Yb3+ energy transfer. Favorable location of the Ce3+ 5d bands in YAM makes this system a great candidate for down-converting, and down-shifting, luminescent layers for photovoltaics.

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