Near-infrared organic light-dependent resistor based on naphthalocyanine
This paper presents a near-infrared (NIR) organic light-dependent resistor (OLDR) utilizing 5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine (ONc) as the photoactive material, and investigates the influence of preparation parameters on device performance. A flexible interdigitated electrode con...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
American Chemical Society
2026
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/123367/1/123367.pdf http://psasir.upm.edu.my/id/eprint/123367/ https://pubs.acs.org/doi/10.1021/acsaelm.5c01731 |
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| Summary: | This paper presents a near-infrared (NIR) organic light-dependent resistor (OLDR) utilizing 5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine (ONc) as the photoactive material, and investigates the influence of preparation parameters on device performance. A flexible interdigitated electrode configuration is employed to fully leverage the excellent mechanical flexibility of organic semiconductor materials. ONc exhibits strong NIR absorption near 924 nm, enabling effective photoresponse under low-light conditions. The device displays typical LDR characteristics and operates stably at a low bias of 2 V, meeting the requirements of optical sensors for low-power, high-response operation. Fabrication is conducted via solution processing, with performance tuning achieved by varying ONc concentration (1–15 mg/mL) and annealing temperature (room temperature to 100 °C). Optimal performance is obtained at a concentration of 10 mg/mL and an annealing temperature of 50 °C, yielding a photocurrent of 52.084 nA under a light intensity of 40.5 mW/cm2. The response and recovery times are 2.173 and 2.185 s, respectively, accompanied by a significant change in resistance of 68.63%. Furthermore, the study explores carrier transport mechanisms and interfacial behavior through morphological analysis and energy-level simulations, providing both theoretical insights and practical guidelines for the development of high-performance, flexible NIR OLDRs. |
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