Aligned silver nanowires as transparent conductive electrodes for flexible optoelectronic devices

2016 ◽  
Vol 4 (47) ◽  
pp. 11074-11080 ◽  
Author(s):  
Fan Wu ◽  
Zidong Li ◽  
Feng Ye ◽  
Xiaoli Zhao ◽  
Tong Zhang ◽  
...  
Keyword(s):  
Silver Nanowires ◽  
Optoelectronic Devices ◽  
Electrical Performance ◽  
Transparent Conductive Electrodes

A novel and facile strategy of restricting the nanowire orientation and thus improving the optical and electrical performance of the AgNW networks is proposed.

scholarly journals Graphene-Based Semiconductor Heterostructures for Photodetectors

Micromachines ◽  
2018 ◽  
Vol 9 (7) ◽  
pp. 350 ◽  
Author(s):  
Dong Shin ◽  
Suk-Ho Choi
Keyword(s):  
Optical Properties ◽  
High Performance ◽  
Optoelectronic Devices ◽  
Semiconductor Heterostructures ◽  
Device Physics ◽  
Electrical And Optical Properties ◽  
Design Performance ◽  
Future Challenges ◽  
Transparent Conductive Electrodes

Graphene transparent conductive electrodes are highly attractive for photodetector (PD) applications due to their excellent electrical and optical properties. The emergence of graphene/semiconductor hybrid heterostructures provides a platform useful for fabricating high-performance optoelectronic devices, thereby overcoming the inherent limitations of graphene. Here, we review the studies of PDs based on graphene/semiconductor hybrid heterostructures, including device physics/design, performance, and process technologies for the optimization of PDs. In the last section, existing technologies and future challenges for PD applications of graphene/semiconductor hybrid heterostructures are discussed.

scholarly journals Advanced Graphene-Based Transparent Conductive Electrodes for Photovoltaic Applications

Micromachines ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 402 ◽  
Author(s):  
Susana Fernández ◽  
Alberto Boscá ◽  
Jorge Pedrós ◽  
Andrea Inés ◽  
Montserrat Fernández ◽  
...  
Keyword(s):  
Thin Films ◽  
Strong Dependence ◽  
Transparent Conductive Oxide ◽  
Electrical Performance ◽  
Transparent Electrodes ◽  
Surface Reflection ◽  
Wide Range ◽  
Cell Front ◽  
Additional Role ◽  
Transparent Conductive Electrodes

New architectures of transparent conductive electrodes (TCEs) incorporating graphene monolayers in different configurations have been explored with the aim to improve the performance of silicon-heterojunction (SHJ) cell front transparent contacts. In SHJ technology, front electrodes play an important additional role as anti-reflectance (AR) coatings. In this work, different transparent-conductive-oxide (TCO) thin films have been combined with graphene monolayers in different configurations, yielding advanced transparent electrodes specifically designed to minimize surface reflection over a wide range of wavelengths and angles of incidence and to improve electrical performance. A preliminary analysis reveals a strong dependence of the optoelectronic properties of the TCEs on (i) the order in which the different thin films are deposited or the graphene is transferred and (ii) the specific TCO material used. The results shows a clear electrical improvement when three graphene monolayers are placed on top on 80-nm-thick ITO thin film. This optimum TCE presents sheet resistances as low as 55 Ω/sq and an average conductance as high as 13.12 mS. In addition, the spectral reflectance of this TCE also shows an important reduction in its weighted reflectance value of 2–3%. Hence, the work undergone so far clearly suggests the possibility to noticeably improve transparent electrodes with this approach and therefore to further enhance silicon-heterojunction cell performance. These results achieved so far clearly open the possibility to noticeably improve TCEs and therefore to further enhance SHJ contact-technology performance.

scholarly journals Graphene-Based Contacts for Optoelectronic Devices

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 919
Author(s):  
Susana Fernández ◽  
Antonio Molinero ◽  
David Sanz ◽  
José González ◽  
Marina Cruz ◽  
...  
Keyword(s):  
Optoelectronic Devices ◽  
Transparent Conductive Oxide ◽  
Future Generation ◽  
Electrical Performance ◽  
Commercial Application ◽  
Graphene Monolayer ◽  
Metal Contacts ◽  
Device Structure ◽  
Ultrasonic Bonding ◽  
Near Future

Hybrid transparent contacts based on combinations of a transparent conductive oxide and a few graphene monolayers were developed in order to evaluate their optical and electrical performance with the main aim to use them as front contacts in optoelectronic devices. The assessment of the most suitable strategies for their fabrication was performed by testing different protocols addressing such issues as the protection of the device structure underneath, the limitation of sample temperature during the graphene-monolayer transfer process and the determination of the most suitable stacking structure. Suitable metal ohmic electrodes were also evaluated. Among a number of options tested, the metal contact based on Ti + Ag showed the highest reproducibility and the lowest contact resistivity. Finally, with the objective of extracting the current generated from optoelectronic devices to the output pins of an external package, focusing on a near future commercial application, the electrical properties of the connections made with an ultrasonic bonding machine (sonic welding) between the optimized Ti + Ag metal contacts and Al or Au micro-wires were also evaluated. All these results have an enormous potential as hybrid electrodes based on graphene to be used in novel designs of a future generation of optoelectronic devices, such as solar cells.

Silver nanowires/ZnO:Al bilayer structures for highly stable transparent conductive electrodes

2015 ◽  
Vol 26 (10) ◽  
pp. 8035-8039
Author(s):  
Jinzhao Wang ◽  
Dongfang Ni ◽  
Tianjin Zhang ◽  
Duofa Wang ◽  
Kun Liang
Keyword(s):  
Silver Nanowires ◽  
Transparent Conductive Electrodes

Biomaterial functionalized graphene oxides with tunable work function for high sensitive organic photodetectors

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 99431-99438 ◽  
Author(s):  
Zhimei Hu ◽  
Chi Li ◽  
Riming Nie ◽  
Yan-Qing Li ◽  
Jian-Xin Tang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Amino Acid ◽  
Work Function ◽  
Optoelectronic Devices ◽  
Optical Transparency ◽  
Functionalized Graphene ◽  
Graphene Oxides ◽  
Organic Photodetectors ◽  
Transparent Conductive Electrodes

Amino acid functionalized graphene acts as an ideal material for transparent conductive electrodes in optoelectronic devices attributed to its tunable work function, excellent electrical conductivity and optical transparency.

Comparative Studies of Transparent Conductive Electrodes Based on Silver Nanowires and Carbon Nanotubes

2015 ◽  
Vol 778 ◽  
pp. 75-78
Author(s):  
Hai Yan Hao ◽  
Lei Dai ◽  
Zhe Li ◽  
Kam Hung Low
Keyword(s):  
Carbon Nanotubes ◽  
Contact Resistance ◽  
Sheet Resistance ◽  
Comparative Studies ◽  
Mechanical Stability ◽  
Silver Nanowires ◽  
Lower Sheet ◽  
Transparent Conductive Electrodes ◽  
Lower Sheet Resistance

The effects of reducing the contact resistance of AgNW networks by using TiO2and PEDOT:PSS were compared. The AgNW+PEDOT:PSS TCE was able to give a lower sheet resistance of 30~60Ω/□, while the AgNW+TiO2gave a relatively higher, but still practical value of 85~125Ω/□. Then the AgNW+PEDOT:PSS TCE was further compared with the SWCNT+PEDOT:PSS TCE, and it was found the SWCNT+PEDOT:PSS TCE had a lower conductivity of 70~110Ω/□ but a superior long-term mechanical stability.

scholarly journals Fibers and Conductive Films Using Silver Nanoparticles and Nanowires by Near-Field Electrospinning Process

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Cheng-Tang Pan ◽  
Tsung-Lin Yang ◽  
Yi-Chian Chen ◽  
Cherng-Yuh Su ◽  
Shin-Pon Ju ◽  
...  
Keyword(s):  
Thin Films ◽  
Silver Nanoparticles ◽  
Sheet Resistance ◽  
Silver Nanowires ◽  
Near Field ◽  
Electrospinning Process ◽  
Conductive Films ◽  
Conductive Film ◽  
The Future ◽  
Transparent Conductive Electrodes

The silver nanowires (AgNWs) and silver nanoparticles (AgNPs) were synthesized. With near-field electrospinning (NFES) process, fibers and thin films with AgNPs and AgNWs were fabricated. In the NFES process, 10 k voltage was applied and the AgNPs and AgNWs fibers can be directly orderly collected without breaking and bending. Then, the characteristics of the fibers were analyzed by four-point probe and EDS. The conductive film was analyzed. When the thickness of films with AgNWs and AgNPs was 1.6 µm, the sheet resistance of films was 0.032 Ω/sq which was superior to that of the commercial ITO. The transmissivity of films was analyzed. The transmissivity was inversely proportional to sheet resistance of the films. In the future, the fibers and films can be used as transparent conductive electrodes.

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