Synthesis and Characterisation of High Fullerene Content Polymers and Their Use in Organic Photovoltaic Devices

2015 ◽  
Vol 68 (11) ◽  
pp. 1767 ◽  
Author(s):  
Sean M. Clark ◽  
Jonathan A. Campbell ◽  
David A. Lewis
Keyword(s):  
Acid Methyl Ester ◽  
Organic Photovoltaic ◽  
Maximum Efficiency ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Bulk Heterojunctions ◽  
Reversible Addition ◽  
High Fullerene ◽  
Conversion Efficiencies ◽  
Fullerene Content

Narrow dispersity polymers with a high tethered fullerene content were synthesised by first polymerising poly(chloromethyl styrene) using reversible addition–fragmentation chain transfer (RAFT) polymerisation and subsequently functionalising them with pristine fullerene. The polymers comprised 52 % by weight fullerene, corresponding to approximately one fullerene per monomer in the polymer with a different morphology to poly(3-hexyl thiophene) (P3HT) : phenyl-C61-butyric acid methyl ester (PCBM) systems. Bulk heterojunctions formed from the polymer tethered fullerene (PTF) with P3HT yielded functioning organic photovoltaic devices with power conversion efficiencies ranging from 0.0030 to 0.22 % as the PTF was increased from 1 : 0.8 to 1 : 1.3. Process optimisation resulted in a maximum efficiency of 0.4 %.

Intrachain Photophysics of a Donor–Acceptor Copolymer

2021 ◽  
Author(s):  
Hak-Won Nho ◽  
Won-Woo Park ◽  
Byongkyu Lee ◽  
seoyoung Kim ◽  
Changduk Yang ◽  
...  
Keyword(s):  
Bulk Heterojunction ◽  
Power Conversion ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Donor Acceptor ◽  
Conversion Efficiencies

By taking advantage of bulk-heterojunction structures formed by blending conjugated donor polymers and non-fullerene acceptors, organic photovoltaic devices have recently attained promising power conversion efficiencies of above 18%. For optimizing...

scholarly journals The Promotion of the Efficiency of Organic Photovoltaic Devices by Addition of Anisotropic CdSe Nanocrystals

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Shu-Ru Chung ◽  
Hong-Shuo Chen ◽  
Chen-Yu Chien ◽  
Meng-Yi Bai ◽  
Kuan-Wen Wang
Keyword(s):  
Active Layer ◽  
Acid Methyl Ester ◽  
Organic Photovoltaic ◽  
Cdse Nanocrystals ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Acid Methyl ◽  
Seed Growth ◽  
Growth Method ◽  
Butyric Acid Methyl Ester

CdSe nanocrystals (NCs) with different morphologies have been synthesized and applied as the acceptor in the active layer of the organic photovoltaic (OPV) devices. CdSe tetrapod (TP)/nanorod (NR) with zinc-blended seeds and wurtzite arms is prepared by seed growth method and mixed with poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). When the concentrations of CdSe in P3HT: PCBM system are 50 wt% optimally, the efficiency can be promoted about 4.3%, suggesting that an enhancement of 13.2% can be obtained and the addition of anisotropic CdSe NCs content in the active layer can be beneficial for the transport of electrons and light absorption in the OPV devices.

Using Bulk Heterojunction Field Effect Measurements to Understand Charge Transport in Solar Cell Materials

2010 ◽  
Vol 1270 ◽  
Author(s):  
Christopher Lombardo ◽  
Ananth Dodabalapur
Keyword(s):  
Recombination Rate ◽  
Carrier Lifetime ◽  
Bulk Heterojunction ◽  
Acid Methyl Ester ◽  
Device Fabrication ◽  
Charge Carriers ◽  
Organic Photovoltaic ◽  
Organic Thin Film ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

AbstractAmbipolar organic thin-film transistors (OTFTs) have been used to study the transport of charge carriers in bulk heterojunction (BHJ) organic photovoltaic devices. Active layers of phase separated blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM), have been chosen due to their use in performance BHJ organic photovoltaic devices as well as ease of device fabrication. A method for determining recombination rate after exciton dissociation and measurement of excess carrier lifetime has been reported by studying drain current behavior which yields carrier mobility, conductivity, and carrier concentration both in dark and AM1.5g illumination. Channel-length dependent measurements of the photocurrent show that significant recombination of separated charge carriers begins to occur at lengths greater than 10 μm. A recombination rate of cm-3 s-1 and a carrier lifetime of ≥ 8.8 ms has been calculated.

scholarly journals Organic photovoltaic devices produced from conjugated polymer / methanofullerene bulk heterojunctions

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1517-1520 ◽  
Author(s):  
C.J. Brabec ◽  
S.E. Shaheen ◽  
T. Fromherz ◽  
F. Padinger ◽  
J.C. Hummelen ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Bulk Heterojunctions

Low-bandgap push–pull molecules in polymer matrices for use in thin-film organic photovoltaic devices

2020 ◽  
Vol 98 (9) ◽  
pp. 564-574 ◽  
Author(s):  
Pierre-Louis M. Brunner ◽  
Daniel Beaudoin ◽  
Alice Heskia ◽  
Thierry Maris ◽  
Marc-André Dubois ◽  
...  
Keyword(s):  
Thin Film ◽  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Electron Donors ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Low Bandgap ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

Conjugated polymers are widely used in thin-film organic photovoltaic devices to absorb light and serve as electron donors or acceptors. Small molecular analogues are attractive substitutes because they have fully defined structures, can be purified rigorously, and are typically more soluble and volatile. However, producing active films composed primarily of small molecules remains challenging. We have devised bulk heterojunction solar cells in which poly(3-hexylthiophene-2,5-diyl) and poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl] are used as matrices to prepare films containing low-bandgap push–pull molecules as electron donors and (6,6)-phenyl-C61-butyric acid methyl ester or (6,6)-phenyl-C71-butyric acid methyl ester as electron acceptors. Compared with reference devices devoid of push–pull molecular additives, increases in power conversion efficiencies up to 30.4% were measured.

Electrospun photonics topography for organic photovoltaics

2014 ◽  
Vol 1671 ◽  
Author(s):  
Khadija Kanwal Khanum ◽  
Praveen C. Ramamurthy
Keyword(s):  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Processing Parameters ◽  
Single Step ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Acid Methyl ◽  
Reflection Of Light ◽  
Butyric Acid Methyl Ester

ABSTRACTA Photonics device requires uniform periodic structural arrangement. Various techniques have been used to fabricate these types of structures, which employs several steps of fabrication. This work proposes single step hierarchical array of equal submicron size porous structure fabricated through tuning electrospinning processing parameters. The dictating parameters were high voltage, tip to collector distance and solvent used on the evolving structure. Morphological and optical investigations suggested the uniform periodic topography and enhancement in light absorption, which is assumed due to internal reflection of light. This structure was evaluated for better light harvesting as active layer in organic photovoltaic devices using poly (3 hexyl thiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blend, and further studying enhancement in photoelectrical characteristics.

scholarly journals P3HT:PCBM Incorporated with Silicon Nanoparticles as Photoactive Layer in Efficient Organic Photovoltaic Devices

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Shang-Chou Chang ◽  
Yu-Jen Hsiao ◽  
To-Sing Li
Keyword(s):  
Silicon Nanoparticles ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Photoactive Layer

Silicon nanoparticles doped poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester blends (P3HT:PCBM: Si NP) have been produced as the photoactive layer of organic photovoltaic devices (OPVs). The silicon nanoparticles’ size is between 80 and 100 nm checked by transmission electron microscope (TEM). The 0.35 wt% Si NP doping OPVs exhibit higher power conversion efficiency (PCE) than other OPVs. The PCE of the OPVs increases from 3.01% to 3.38% mainly due to increasing short-circuit current density from 8.38 to 9.48 mA/cm2, while the open-circuit voltage remains the same. The Si NP can provide extra exciton separation and electron pathways in hybrid solar cells.

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