Neutral-pH PEDOT:PSS as over-coating layer for stable silver nanowire flexible transparent conductive films

Chen, S.; Song, Lingnan; Tao, Zhi; Shao, Xiangfeng; Huang, Yongjun; Qian, Chao; Guo, Xingzhong

doi:10.1016/j.orgel.2014.09.047

Cited by 101 publications

(100 citation statements)

References 30 publications

Supporting

Mentioning

100

Contrasting

Order By: Relevance

“…This conductivity ratio is comparable to that of the ITO film (s DC /s Op (l) = 500) and significantly higher than that of previously reported AgNW/conducting polymer films. 6,9 Fig. Due to the direct one-step coating using a single AgNW/PEDOT:PSS mixture, the fabricated conducting films showed much higher transmittance at the same sheet resistance.…”

Section: Resultsmentioning

confidence: 98%

“…Among the conducting materials, metallic nanowires are considered as the best candidates for ITO replacement because only metallic nanowires can be deposited from solution by a coating process to achieve the performance equivalent to that of ITO. [5][6][7][8][9][10] PEDOT:PSS is the most commonly used composite material owing to its high conductivity and transparency. 3 Although metallic nanowires show good electrical and optical properties, they cannot be used directly as transparent electrodes for organic photovoltaics (OPV) or organic lightemitting diodes (OLED) because of the large-sized holes and inhomogeneous resistance distribution throughout the conducting film, which gives rise to the degradation of the device performances, resulting from inefficient electron collection.…”

Section: Introductionmentioning

confidence: 99%

“…9 This pH-neutral PEDOT:PSS was prepared by adding guanidine, which is a strong base with relatively low melting and boiling points. 9 This pH-neutral PEDOT:PSS was prepared by adding guanidine, which is a strong base with relatively low melting and boiling points.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A one-step roll-to-roll process of stable AgNW/PEDOT:PSS solution using imidazole as a mild base for highly conductive and transparent films: optimizations and mechanisms

Kim

Chung

et al. 2015

J. Mater. Chem. C

View full text Add to dashboard Cite

A recent increase in the demand for transparent electrodes has led to shortage in supply and an increase in the price of indium tin oxide (ITO) films deposited by sputter coating owing to coating speed limitations. Furthermore, flexibility has become one of the essential properties of transparent electrodes, accounting for the rapidly changing trend in electronics. These problems can be overcome by AgNWbased films suitable for flexible and stable conductive electrodes by using wet-coating-processable material and roll-to-roll coating. In this work, we developed an effective method to fabricate a highly conductive, transparent, and stable AgNW/PEDOT:PSS film using roll-to-roll slot-die coating. This coating technique provides higher line speed and greater coating uniformity. Furthermore, the optimized AgNW/PEDOT:PSS solution allows direct one-step coating without any post-treatment, such as hightemperature annealing, mechanical pressure, and solvent washing. We also studied the mechanisms of AgNW corrosion induced by the acidity of PEDOT:PSS and by hydrogen sulfide (H 2 S) and carbonyl sulfide (OCS) of the atmosphere. Corrosion could be prevented by neutralizing PEDOT:PSS using imidazole, which is a suitable organic compound in terms of both material and processing properties owing to its mild basicity and high melting and boiling points. In addition, the over-coating by a silica-based protecting layer on the AgNW/PEDOT:PSS film resulted in enhanced corrosion protection. The resulting roll film (460 mm in width Â 20 m in length) showed suitable electrical (R s B 75 O sq À1 ) and optical (T 4 90% at 550 nm, haziness B1.21%, b* B 0.72) properties to replace ITO films in touch screen panels.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A one-step roll-to-roll process of stable AgNW/PEDOT:PSS solution using imidazole as a mild base for highly conductive and transparent films: optimizations and mechanisms

Kim

Chung

et al. 2015

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

“…48 We suggest here that water absorption of PEDOT:PSS could therefore also impact the mechanisms of ageing leading to breakage of nanowires into particles. Although the electrical properties of AgNW electrodes coated with PEDOT:PSS were degraded faster than those of pristine networks, 49 it must be noted that the sheet resistance usually remained below 300 Ω/sq after 2 years, which can be sufficient for many applications. However, these spin-coated samples did not show a very high transparency.…”

Section: Stability Of Agnw/pedot:pss Compositementioning

confidence: 99%

Stability of silver nanowire based electrodes under environmental and electrical stresses

et al. 2015

View full text Add to dashboard Cite

Flexible transparent electrodes fabricated with random networks of silver nanowires (AgNWs) have been widely studied in recent years. This approach appears to be a promising alternative to replace ITO (indium tin oxide) in many optoelectronic applications. Many successful integrations in functional devices have already evidenced the high potential of this technology, but unfortunately only very few studies have been dedicated so far to the stability of this material. We present here a study dealing with the alteration of the electrical properties of AgNW meshes when subjected to different stresses. We demonstrate that AgNW electrodes are very stable when stored under ambient atmosphere up to, at least, two and a half years. Accelerated ageing processes also reveal that concentrated H2S or exposure to light does not cause any significant sheet resistance modification. However, the combination of high relative humidity and high temperature seems to be more critical. In addition, long lasting contact (two years) with PEDOT:PSS can induce deterioration of the electrical properties. Similarly, AgNW/PEDOT:PSS hybrid materials exhibit weaker stability under electrical stress when compared to pristine AgNW networks.

show abstract

“…PSS − is a strong acid that can react with In 2 O 3 dissociating indium ions which can easily diffuse into active layer, deteriorating the stability of the devices [91]. A common way to neutralize acidic properties of PEDOT:PSS is to add strong bases such as NaOH [92], KOH [93] and guanidine [94]. However, the neutralization using strong base badly affects the conductivity of PEDOT:PSS, which results in low device performance [92].…”

Section: Enhancement In Stabilitymentioning

confidence: 99%

A Review on Tailoring PEDOT:PSS Layer for Improved Performance of Perovskite Solar Cells

Reza¹,

Mabrouk²,

Qiao³

2018

Proc. Nat. Res. Soc.

View full text Add to dashboard Cite

Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) is the most commonly used hole transport layer (HTL) in inverted (p-i-n) structured perovskite solar cells (PSCs) due to remarkable transparency and conductivity. Despite high transparency and conductivity, PEDOT:PSS has some concealed problems such as acidity, hygroscopic nature, lower work function than the ionization potential of perovskite, and poor electron blocking capability. All these properties hinder the efficient charge extraction and transport from perovskite absorber to ITO. In addition, acidic and hygroscopic nature of PEDOT:PSS can corrode the ITO electrode and degrade the moisture sensitive PSK layer, respectively. These can degrade the long-term stability and lower the performance of PSCs. Therefore, tailoring PEDOT:PSS HTL is essential for achieving highly efficient PSCs to mitigate these drawbacks. This review article gives an overview of approaches tailoring PEDOT:PSS that can minimize the limitations as HTL to improve the performance of PSCs. These include solvent treatment, composite structure, doping, and bi-layer structure PEDOT:PSS. In addition, the roles of tailored PEDOT:PSS HTL was understood in perovskite solar cells.

show abstract

Neutral-pH PEDOT:PSS as over-coating layer for stable silver nanowire flexible transparent conductive films

Cited by 101 publications

References 30 publications

A one-step roll-to-roll process of stable AgNW/PEDOT:PSS solution using imidazole as a mild base for highly conductive and transparent films: optimizations and mechanisms

A one-step roll-to-roll process of stable AgNW/PEDOT:PSS solution using imidazole as a mild base for highly conductive and transparent films: optimizations and mechanisms

Stability of silver nanowire based electrodes under environmental and electrical stresses

A Review on Tailoring PEDOT:PSS Layer for Improved Performance of Perovskite Solar Cells

Contact Info

Product

Resources

About