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Degradation problem in silver nanowire transparent electrodes caused by ultraviolet exposure
| Content Provider | Scilit |
|---|---|
| Author | Lin, Chiao-Chi Lin, Dong-Xuan Lin, Shih-He |
| Copyright Year | 2020 |
| Description | Journal: Nanotechnology Silver nanowires (AgNWs) transparent electrode is inevitably encountering ultraviolet (UV) irradiation from the environment, leading to stability and durability problems when in operation. Since UVA is the most abundant UV band and highly penetrating to AgNWs related optoelectrical devices, it is crucial to understand the UVA caused damages to AgNWs. In this study, transparent electrodes composed of pristine AgNWs and glass substrates were manufactured with optimized processing parameters, and then used as model samples for aging tests. UVA exposure was conducted at elevated temperatures including 45ºC, 60ºC and 75ºC at 12±5.5% relative humidity (RH) conditions. Comparative aging tests using conditions of damp heat (85ºC/85 % RH) and 105ºC without UV (dark conditions) were also performed. The relationship between optoelectrical properties degradation, morphological changes, and photo-corrosion was discussed. Under UVA exposure, sheet resistance of electrodes increased gradually in an induction period before an abrupt change occurred. A sheet resistance value of nominally 200 Ω/sq was considered as a predestinated failure of electrical property. It took 16 h, 24h and 60 h for UVA exposure at 75ºC, 60ºC and 45ºC, respectively, and took 288 h by damp heat aging to degrade to the same status of predestinated failure. Aging results of dark conditions indicated no degradation effect on AgNWs for 126 days aging. Moisture caused a different mechanism in damaging the capping agents on AgNWs. Nanocubes of silver chloride and sodium chloride were prone to precipitate at higher aging temperature such as 75ºC with UVA exposure. Sulfidation accounted for deterioration of optical transmittance, and occurred significantly at 45ºC with UVA irradiation and damp heat conditions. Synergistic aging effects of UVA irradiance at elevated temperature on AgNWs degradation have been unambiguously demonstrated. The results of this study provide guidelines for the design of optoelectronic devices when utilizing AgNWs transparent electrodes. |
| Related Links | https://iopscience.iop.org/article/10.1088/1361-6528/ab724f/pdf |
| ISSN | 09574484 |
| e-ISSN | 13616528 |
| DOI | 10.1088/1361-6528/ab724f |
| Journal | Nanotechnology |
| Issue Number | 21 |
| Volume Number | 31 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2020-02-03 |
| Access Restriction | Open |
| Subject Keyword | Journal: Nanotechnology Elevated Temperatures |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering |
