| Autor: |
Jacoutot, P, Scaccabarozzi, A, Nodari, D, Panidi, J, Qiao, Z, Schiza, A, Nega, A, Dimitrakopoulou-Strauss, A, Gregoriou, V, Heeney, M, Chochos, C, Bakulin, A, Gasparini, N |
| Rok vydání: |
2023 |
| Popis: |
One of the key challenges facing organic photodiodes (OPD) is increasing the detection into the IR region. Organic semiconductor polymers provide a platform for tuning the bandgap and optoelectronic response to go beyond the traditional 1000 nm benchmark. In this work, we present a NIR polymer with absorption up to 1500 nm. The polymer-based OPD delivers a high specific detectivity D* of 1.03×1010 Jones (-2 V) at 1200 nm and a dark current Jd of just 2.3×10-6 A cm-2 at -2V. We demonstrate a strong improvement of all OPD metrics in the NIR region compared to previously reported NIR-OPD, due to the enhanced crystallinity and optimized energy alignment which leads to reduced charge recombination. The high D* value in the 1100-1300 nm region is particularly promising for biosensing applications. We demonstrate the OPD as a pulse oximeter under NIR illumination, delivering heart rate and blood oxygen saturation readings in real-time without signal amplification. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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