In Situ Visualization and Quantification of Electrical Self‐Heating in Conjugated Polymer Diodes Using Raman Spectroscopy

Autor: Sudeshna Maity, Charusheela Ramanan, Freek Ariese, Roderick C. I. MacKenzie, Elizabeth von Hauff
Přispěvatelé: Photo Conversion Materials, LaserLaB - Energy, Biophotonics and Medical Imaging, LaserLaB - Biophotonics and Microscopy, Publica, Spectroscopy and Photonic Materials (HIMS, FNWI)
Rok vydání: 2022
Předmět:
Zdroj: Advanced Electronic Materials, 2022, Vol.8(7), pp.2101208 [Peer Reviewed Journal]
Advanced Electronic Materials, 8(7):2101208, 1-9. Wiley
Advanced Electronic Materials
Maity, S, Ramanan, C, Ariese, F, MacKenzie, R C I & von Hauff, E 2022, ' In Situ Visualization and Quantification of Electrical Self-Heating in Conjugated Polymer Diodes Using Raman Spectroscopy ', Advanced Electronic Materials, vol. 8, no. 7, 2101208, pp. 1-9 . https://doi.org/10.1002/aelm.202101208
Advanced Electronic Materials, 8(7):2101208. Wiley-VCH Verlag
ISSN: 2199-160X
Popis: Self-heating in organic electronics can lead to anomalous electrical performance and even accelerated degradation. However, in the case of disordered organic semiconductors, self-heating effects are difficult to quantify using electrical techniques alone due to complex transport properties. Therefore, more direct methods are needed to monitor the impact of self-heating on device performance. Here, self-heating in poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b′] dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT) diodes is visualized using Raman spectroscopy, and thermal effects due to self-heating are quantified by exploiting temperature-dependent shifts in the polymer vibrational modes. The temperature increases due to self-heating are quantified by correlating the Raman shifts observed in electrically biased diodes with temperature-dependent Raman measurements. Temperature elevations up to 75 K are demonstrated in the PCPDTBT diodes at moderate power of about 2.6–3.3 W cm−2. Numerical modeling rationalizes the significant role of Joule and recombination heating on the diode current–voltage characteristics. This work demonstrates a facile approach for in situ monitoring of self-heating in organic semiconductors for a range of applications, from fundamental transport studies to thermal management in devices.
Databáze: OpenAIRE
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