scholarly journals A photochemical layer-by-layer solution process for preparing organic semiconducting thin films having the right material at the right place

2018 ◽  
Vol 9 (32) ◽  
pp. 6614-6621 ◽  
Author(s):  
Mitsuharu Suzuki ◽  
Yuji Yamaguchi ◽  
Kensuke Uchinaga ◽  
Katsuya Takahira ◽  
Cassandre Quinton ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Molecule ◽  
Solution Process ◽  
Layer By Layer ◽  
The Right ◽  
Semiconducting Thin Films ◽  
Controlled Preparation ◽  
Layer Solution

A mild and versatile solution process enables the controlled preparation of multicomponent organic small-molecule thin films.

Layer by layer solution processed organic solar cells based on a small molecule donor and a polymer acceptor

2015 ◽  
Vol 3 (2) ◽  
pp. 447-452 ◽  
Author(s):  
Yifan Wang ◽  
Xingang Zhao ◽  
Xiaowei Zhan
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Solution Process ◽  
Layer By Layer ◽  
Polymer Acceptor ◽  
Layer Solution

Inverted organic solar cells based on a small molecule donor and a polymer acceptor were fabricated using a layer by layer solution process, which exhibited a power conversion efficiency up to 1.12%.

Small-Molecule Solar Cells with Fill Factors up to 0.75 via a Layer-by-Layer Solution Process

2013 ◽  
Vol 4 (1) ◽  
pp. 1300626 ◽  
Author(s):  
Yuze Lin ◽  
Lanchao Ma ◽  
Yongfang Li ◽  
Yunqi Liu ◽  
Daoben Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Solution Process ◽  
Layer By Layer ◽  
Layer Solution

scholarly journals Highly Conductive PEDOT:PSS Thin Films with Two-Dimensional Lamellar Stacked Multi-Layers

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2211
Author(s):  
Youngno Kim ◽  
Yunryeol Kim ◽  
Jung Kim
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Carrier Mobility ◽  
Electrode Materials ◽  
Solution Process ◽  
Molecular Structures ◽  
Heterogeneous Structure ◽  
Layer By Layer ◽  
Two Dimensional ◽  
X Ray

Conjugated polymers are desired as organic electrode materials because of their functional properties such as solution process, low cost, and transparency. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), in particular, shows the highest applicability, but its heterogeneous structure presents limitations in terms of electrical conductivity. In this study, a facile method to fabricate multi-layered thin films with higher ordered structures was developed. Through the etching process with H2SO4 and dimethyl sulfoxide(DMSO), the insulated rich-PSS was removed from the upper layer to improve its electrical properties and rearrange the PEDOT molecular structures. The thickness of PEDOT:PSS thin films was experimentally optimized to maximize the enhancement of carrier mobility via a layer-by-layer (LBL) process. The combined method, consisted of etching and the LBL process, showed the improvement of the charge carrier mobility from 0.62 to 2.80 cm2 V−1 s−1. The morphology and crystallinity of the ordered PEDOT:PSS structure were investigated by X-ray photoemission spectroscopy (XPS), Raman, and X-ray diffraction (XRD). As a result, two-dimensional lamellar-stacked PEDOT:PSS thin films were fabricated through the repetitive etching and LBL process. The optimized PEDOT:PSS thin film showed an excellent electrical conductivity of 3026 S cm−1, which is 3.8 times higher than that of the pristine film (801 S cm−1).

Dark Current Reduction Strategy via a Layer-By-Layer Solution Process for a High-Performance All-Polymer Photodetector

2019 ◽  
Vol 11 (8) ◽  
pp. 8350-8356 ◽  
Author(s):  
Zhiming Zhong ◽  
Laju Bu ◽  
Peng Zhu ◽  
Tong Xiao ◽  
Baobing Fan ◽  
...  
Keyword(s):  
Dark Current ◽  
High Performance ◽  
Solution Process ◽  
Layer By Layer ◽  
Reduction Strategy ◽  
Current Reduction ◽  
Layer Solution

scholarly journals Steric hindrance dependence on the spin and morphology properties of highly oriented self-doped organic small molecule thin films

2021 ◽  
Author(s):  
Daniel Powell ◽  
Eric V. Campbell ◽  
Laura Flannery ◽  
Jonathan Ogle ◽  
Sarah E. Soss ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Molecule ◽  
Steric Hindrance ◽  
Design Principles ◽  
Semiconducting Thin Films ◽  
Fundamental Design

We provide fundamental design principles on the effect of dopant structure (steric hindrance) on the doping efficiency in highly oriented self-doped organic semiconducting thin films.

Annealing Behavior with Thickness Hindered Nucleation in Small-Molecule Organic Semiconductor Thin Films

2019 ◽  
Vol 19 (7) ◽  
pp. 3777-3784
Author(s):  
Jakub Rozbořil ◽  
Katharina Broch ◽  
Roland Resel ◽  
Ondřej Caha ◽  
Filip Münz ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Molecule ◽  
Organic Semiconductor ◽  
Annealing Behavior ◽  
Semiconductor Thin Films

scholarly journals Stabilization of Ferroelectric Phase in Highly Oriented Quinuclidinium Perrhenate (HQReO4) Thin Films

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2126
Author(s):  
Junyoung Lee ◽  
Woojun Seol ◽  
Gopinathan Anoop ◽  
Shibnath Samanta ◽  
Sanjith Unithrattil ◽  
...  
Keyword(s):  
Thin Films ◽  
Solution Process ◽  
Intermediate Temperature ◽  
Perovskite Oxide ◽  
Temperature Phase ◽  
Polar Phase ◽  
Practical Applications ◽  
Temperature Range ◽  
Potential Alternative ◽  
Temperature Window

The low-temperature processability of molecular ferroelectric (FE) crystals makes them a potential alternative for perovskite oxide-based ferroelectric thin films. Quinuclidinium perrhenate (HQReO4) is one such molecular FE crystal that exhibits ferroelectricity when crystallized in an intermediate temperature phase (ITP). However, bulk HQReO4 crystals exhibit ferroelectricity only for a narrow temperature window (22 K), above and below which the polar phase transforms to a non-FE phase. The FE phase or ITP of HQReO4 should be stabilized in a much wider temperature range for practical applications. Here, to stabilize the FE phase (ITP) in a wider temperature range, highly oriented thin films of HQReO4 were prepared using a simple solution process. A slow evaporation method was adapted for drying the HQReO4 thin films to control the morphology and the temperature window. The temperature window of the intermediate temperature FE phase was successfully widened up to 35 K by merely varying the film drying temperature between 333 and 353 K. The strategy of stabilizing the FE phase in a wider temperature range can be adapted to other molecular FE materials to realize flexible electronic devices.

scholarly journals Modeling the Layer-by-Layer Growth of HKUST-1 Metal-Organic Framework Thin Films

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1631
Author(s):  
Qiang Zhang ◽  
Yohanes Pramudya ◽  
Wolfgang Wenzel ◽  
Christof Wöll
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Deposition Rate ◽  
Layer Growth ◽  
Coarse Grained ◽  
Structural Defects ◽  
Effect Of Temperature ◽  
Layer By Layer ◽  
Reactant Concentration ◽  
Metal Organic

Metal organic frameworks have emerged as an important new class of materials with many applications, such as sensing, gas separation, drug delivery. In many cases, their performance is limited by structural defects, including vacancies and domain boundaries. In the case of MOF thin films, surface roughness can also have a pronounced influence on MOF-based device properties. Presently, there is little systematic knowledge about optimal growth conditions with regard to optimal morphologies for specific applications. In this work, we simulate the layer-by-layer (LbL) growth of the HKUST-1 MOF as a function of temperature and reactant concentration using a coarse-grained model that permits detailed insights into the growth mechanism. This model helps to understand the morphological features of HKUST-1 grown under different conditions and can be used to predict and optimize the temperature for the purpose of controlling the crystal quality and yield. It was found that reactant concentration affects the mass deposition rate, while its effect on the crystallinity of the generated HKUST-1 film is less pronounced. In addition, the effect of temperature on the surface roughness of the film can be divided into three regimes. Temperatures in the range from 10 to 129 °C allow better control of surface roughness and film thickness, while film growth in the range of 129 to 182 °C is characterized by a lower mass deposition rate per cycle and rougher surfaces. Finally, for T larger than 182 °C, the film grows slower, but in a smooth fashion. Furthermore, the potential effect of temperature on the crystallinity of LbL-grown HKUST-1 was quantified. To obtain high crystallinity, the operating temperature should preferably not exceed 57 °C, with an optimum around 28 °C, which agrees with experimental observations.

Sign in / Sign up

Export Citation Format

Share Document