Trifluoromethylation of Tetraphenylborate Counterions in Cationic Iridium(III) Complexes: Enhanced Electrochemical Stabilities, Charge-Transport Abilities, and Device Performance

2014 ◽  
Vol 20 (48) ◽  
pp. 15903-15912 ◽  
Author(s):  
Dongxin Ma ◽  
Lian Duan ◽  
Yongge Wei ◽  
Yong Qiu
Keyword(s):  
Charge Transport ◽  
Device Performance ◽  
Electrochemical Stabilities

Hole-transporting materials for low donor content organic solar cells: Charge transport and device performance

2020 ◽  
Vol 76 ◽  
pp. 105480 ◽  
Author(s):  
Wei Jiang ◽  
Chen Tao ◽  
Martin Stolterfoht ◽  
Hui Jin ◽  
Meera Stephen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
Device Performance ◽  
Hole Transporting ◽  
Hole Transporting Materials

LIGHT-EMITTING PROPERTIES OF FLUORENE-BASED COPOLYMERS

2004 ◽  
Vol 13 (03n04) ◽  
pp. 637-642 ◽  
Author(s):  
DO-HOON HWANG ◽  
JONG-DON LEE ◽  
MOO-JIN PARK ◽  
JI-HOON LEE ◽  
CHANG-HEE LEE
Keyword(s):  
Charge Transport ◽  
Random Copolymers ◽  
Device Performance ◽  
Visible Absorption ◽  
Light Emitting ◽  
Hole Transporting ◽  
Uv Visible ◽  
Pl Emission

A series of random copolymers of 2,7-dibromo-9,9-bis(4′-n-octyloxyphenyl) fluorene (BOPF) and 2,7-dibromo-N-(2′-ethylhexyl)carbazole (EHC) were synthesized through Ni (0)-mediated polymerization. Carbazole comonomer was introduced to improve the hole-transporting properties of PBOPF. The synthesized poly(BOPF-co-EHC)s showed similar UV-visible absorption and PL emission to PBOPF. EL devices were fabricated in an ITO/PEDOT/polymer/Ca/Al configuration. EL devices which used copolymers showed improved device performance over devices which used PBOPF homopolymers due to a more balanced charge transport.

Electroluminescent Diodes Using Cyclohexane-Based Glass Forming Liquid Crystals and Their Analogues

1996 ◽  
Vol 425 ◽  
Author(s):  
C. P. Lin ◽  
T. Tsutsui ◽  
S. Saito ◽  
S. H. Chen ◽  
J. C. Mastrangelo ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electron Transport ◽  
Charge Transport ◽  
Single Layer ◽  
Hole Transport ◽  
Device Performance ◽  
Glass Forming ◽  
Two Component ◽  
Organic Electroluminescent ◽  
Transport Molecules

AbstractOrganic electroluminescent(EL) diodes using spin-coat films of cyclohexane-based glass-forming liquid crystal (LC) materials were fabricated. The cyclohexane-based LC materials were found to be useful for EL diodes. Blending the LC materials with charge transport molecules was found to be a promising method for improving device performance. Conventional hole transport and electron transport molecules were found to show a tendency to form exciplexes with cyclohexanebased LC materials. This difficulty was overcome by the introduction of cyclohexane-based charge transport molecules. The EL quantum efficiency of 0.06% was attained in the single-layer devices with two-component blends.

scholarly journals Modification of NiOx hole transport layer for acceleration of charge extraction in inverted perovskite solar cells

RSC Advances ◽  
2020 ◽  
Vol 10 (21) ◽  
pp. 12289-12296 ◽  
Author(s):  
Zezhu Jin ◽  
Yanru Guo ◽  
Shuai Yuan ◽  
Jia-Shang Zhao ◽  
Xiao-Min Liang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Charge Transport ◽  
Surface Property ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Device Performance ◽  
Charge Extraction

The NiOx layer modified with NiOx nanoparticles obtains surface property optimization and energy level modulation, thus improving charge transport and device performance.

Understanding charge transport and recombination losses in high performance polymer solar cells with non-fullerene acceptors

2017 ◽  
Vol 5 (33) ◽  
pp. 17230-17239 ◽  
Author(s):  
Xuning Zhang ◽  
Xiaobing Zuo ◽  
Shenkun Xie ◽  
Jianyu Yuan ◽  
Huiqiong Zhou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
High Performance ◽  
Polymer Solar Cells ◽  
Reduction Factor ◽  
Device Performance ◽  
High Performance Polymer ◽  
Polymer Devices ◽  
Photovoltaic Characteristics

Photovoltaic characteristics, recombination and charge transport properties are investigated. The determined recombination reduction factor can reconcile the supreme device performance in organic solar cells using non-fullerene ITIC acceptor and severe carrier losses in all-polymer devices with P(NDI2OD-T2).

Influence of interface properties on charge density, band edge shifts and kinetics of the photoelectrochemical process in p-type NiO photocathodes

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 71778-71784 ◽  
Author(s):  
Qian Liu ◽  
Lifang Wei ◽  
Shuai Yuan ◽  
Xin Ren ◽  
Yin Zhao ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Transport ◽  
Device Performance ◽  
Interface Properties ◽  
Trap States ◽  
Band Energy ◽  
Photoelectrochemical Process ◽  
Density Band ◽  
P Type ◽  
Kinetics Of

The surface structure of NiO is correlated to observed changes in the band energy, energetic distribution of the trap states density, charge interface transfer, charge transport, and as a result the p-type DSSC device performance.

scholarly journals De Novo Calculation of the Charge Carrier Mobility in Amorphous Small Molecule Organic Semiconductors

2021 ◽  
Vol 9 ◽  
Author(s):  
Simon Kaiser ◽  
Tobias Neumann ◽  
Franz Symalla ◽  
Tobias Schlöder ◽  
Artem Fediai ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Charge Transport ◽  
Organic Semiconductors ◽  
Carrier Mobility ◽  
De Novo ◽  
Charge Carrier Mobility ◽  
Device Performance ◽  
Zero Field ◽  
Virtual Design

Organic semiconductors (OSC) are key components in applications such as organic photovoltaics, organic sensors, transistors and organic light emitting diodes (OLED). OSC devices, especially OLEDs, often consist of multiple layers comprising one or more species of organic molecules. The unique properties of each molecular species and their interaction determine charge transport in OSCs—a key factor for device performance. The small charge carrier mobility of OSCs compared to inorganic semiconductors remains a major limitation of OSC device performance. Virtual design can support experimental R&D towards accelerated R&D of OSC compounds with improved charge transport. Here we benchmark a de novo multiscale workflow to compute the charge carrier mobility solely on the basis of the molecular structure: We generate virtual models of OSC thin films with atomistic resolution, compute the electronic structure of molecules in the thin films using a quantum embedding procedure and simulate charge transport with kinetic Monte-Carlo protocol. We show that for 15 common amorphous OSC the computed zero-field and field-dependent mobility are in good agreement with experimental data, proving this approach to be an effective virtual design tool for OSC materials and devices.

Impact of the photo-induced degradation of electron acceptors on the photophysics, charge transport and device performance of all-polymer and fullerene–polymer solar cells

2017 ◽  
Vol 5 (42) ◽  
pp. 22170-22179 ◽  
Author(s):  
Taesu Kim ◽  
Robert Younts ◽  
Wonho Lee ◽  
Seungjin Lee ◽  
Kenan Gundogdu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Comparative Study ◽  
Charge Transport ◽  
Polymer Solar Cells ◽  
Electron Acceptors ◽  
Device Performance

We report a comparative study of the photo-stabilities of all-polymer and fullerene-polymer solar cells based on the same polymer donor.

Improved device performance of rod like ZnO in a Schottky type photosensor compared to particle like ZnO: Analysis of charge transport

2021 ◽  
Vol 130 ◽  
pp. 105799
Author(s):  
Mrinmay Das ◽  
Pubali Das ◽  
Joydeep Datta ◽  
Dhananjoy Das ◽  
Somobrata Acharya ◽  
...  
Keyword(s):  
Charge Transport ◽  
Device Performance ◽  
Schottky Type
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