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Enhanced surface passivation with TIPS pentacene and additional interfacial layer for MIS solar cells

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Abstract

The next wave of Information technology is powered by Industry 4.0 which brings digital and physical technologies together to create interconnected operations. Sensors would be required to be embedded in physical objects to capture and stream data on a continuous basis. Energy harvesting is critical for these sensors, which need continuous supply of electricity for reliable transmission of data. Graphene/Silicon (Gr/Si) Metal–Insulator-semiconductor (MIS) solar cells are emerging to be the most suitable option for energy harvesting for applications in wireless sensor networks (WSN). But efficiency is constrained by surface defects and dangling bonds. High carrier recombination at the Silicon surface restricts enhancement w.r.t. open circuit voltage (Voc) and minority carrier lifetime (τeff). In this study, 6,13-bis (triisopropylsilylethynyl) (TIPS) pentacene, thin film is employed as electron blocking layer. The novelty of the work is the addition of the oxide layer between TIPS Pentacene and Silicon. This work simulates and verify experimentally, the passivation ability of TIPS Pentacene along with oxidation of Silicon surface. The band alignment between TIPS Pentacene and Silicon, increases the Schottky barrier height (SBH). Additional oxide layer saturates most of the dangling bonds at the Silicon surface. The average open circuit voltage (Voc) of the MIS silicon solar cell with combination of TIPS Pentacene and oxide layer, increases by ~ 6% as compared with that of only TIPS Pentacene layer. The minority carrier lifetime also enhances by ~ 6%. These solar cells can be manufactured with low temperature and safe chemical oxide passivation process for high efficiency and low cost WSN applications.

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Funding

This work (fabrication and characterization) was carried out at the NCPRE, IITB under PUMP which is funded by MNRE, Government of India. Authors acknowledge the facilities and guidance extended to use fabrication and characterization facility available at NCPRE, IITB.

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Authors and Affiliations

  1. Thakur College of Engineering and Technology, Thakur Village, Kandivali (E), Mumbai, India

    Sukruti Kaulgud, Lochan Jolly & B. K. Mishra

  2. IIT Bombay, Powai, Mumbai, India

    Rajni Sharma

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  1. Sukruti Kaulgud
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  2. Rajni Sharma
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  3. Lochan Jolly
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  4. B. K. Mishra
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Correspondence to Sukruti Kaulgud.

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Kaulgud, S., Sharma, R., Jolly, L. et al. Enhanced surface passivation with TIPS pentacene and additional interfacial layer for MIS solar cells. Int. j. inf. tecnol. 13, 1323–1330 (2021). https://doi.org/10.1007/s41870-021-00654-6

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  • DOI: https://doi.org/10.1007/s41870-021-00654-6

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