Hrisheekesh Thachoth Chandran,Cenqi Yan,Gang Li
Progress in Organic Photodiodes through Physical Process Insights
Adv. Energy Sustainability Res. (2022) 2200002.
DOI: 10.1002/aesr.202200002
*The Hong Kong Polytechnic University
Abstract: Photodetectors based on organic materials have enormous potential due to their attractive optoelectronic and mechanical properties. In recent years, some of the performance metrics comparable to the conventional inorganic photodetectors have been realized in visible-range organic photodiodes (OPDs). These advancements in OPDs are mainly driven by innovations in device engineering and material design. However, insights into the fundamental performance limiting factors are imperative to further understand, optimize, and predict the performance metrics of OPD devices beyond conventional wisdom. In this review, the major progress in understandings related to trap state, charge transfer state, and noise/detectivity limits in OPD devices are highlighted.
FIG: (a) Simplified device architecture of cavity-enhanced photodiode. (b) Simplified energy-level diagram with the demonstration of photon absorption, charge generation, and charge transport processes.
Acknowledgements: This work was supported by the following grants: Research Grants Council of Hong Kong (GRF grant 15221320, CRF C5037-18G), National Science Foundation of China (NSFC 51961165102), Shenzhen Science and Technology Innovation Commission (Project No. JCYJ 20200109105003940), and the Hong Kong Polytechnic University (The Sir Sze-yuen Chung Endowed Professorship Fund (8-8480) and Postdoc Matching Fund scheme (1-W15V)).
