Volume 28, Issue 9 pp. 946-955
RESEARCH ARTICLE

Organic tandem solar cells under indoor light illumination

Swarup Biswas

Swarup Biswas

School of Electrical and Computer Engineering, Institute of Information Technology, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul, 02504 Republic of Korea

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Young-Jun You

Young-Jun You

Division of Electronics and Electrical Engineering, Dongguk University, Seoul, 04620 Republic of Korea

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Premkumar Vincent

Premkumar Vincent

School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566 Republic of Korea

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Jin-Hyuk Bae

Corresponding Author

Jin-Hyuk Bae

School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566 Republic of Korea

Correspondence

J. H. Bae, School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, Republic of Korea.

Email: [email protected]

J. W. Shim, School of Electrical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.

Email: [email protected]

H. Kim, School of Electrical and Computer Engineering, Institute of Information Technology, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Republic of Korea.

Email: [email protected]

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Jae Won Shim

Corresponding Author

Jae Won Shim

School of Electrical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea

Correspondence

J. H. Bae, School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, Republic of Korea.

Email: [email protected]

J. W. Shim, School of Electrical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.

Email: [email protected]

H. Kim, School of Electrical and Computer Engineering, Institute of Information Technology, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Republic of Korea.

Email: [email protected]

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Hyeok Kim

Corresponding Author

Hyeok Kim

School of Electrical and Computer Engineering, Institute of Information Technology, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul, 02504 Republic of Korea

Correspondence

J. H. Bae, School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, Republic of Korea.

Email: [email protected]

J. W. Shim, School of Electrical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.

Email: [email protected]

H. Kim, School of Electrical and Computer Engineering, Institute of Information Technology, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Republic of Korea.

Email: [email protected]

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First published: 09 June 2020
Citations: 21

Swarup Biswas, Young-Jun You, and Premkumar Vincent contributed equally to this work.

Abstract

The lifetime of a device depends highly on that of its battery. In order to enhance the longevity of microsystems or sensor networks, it is necessary for these devices to be self-powered. Indoor photovoltaics allow the possibility of harvesting artificial light sources for powering microsystems. Whereas indoor photovoltaics based on single active layers have showed high efficiencies under LED lighting, tandem structures have yet to be tested extensively. In our study, we use finite-difference time-domain simulations to study the highest possible short-circuit current density that can be extracted from tandem organic devices. We compare the simulation results to the results for photovoltaic devices based on single bulk active layer heterojunctions. Our simulations found that although detailed balanced band gap calculations show tandem photovoltaics to be viable, the low-intensity emission spectra of white LED light sources can be better harvested by single active layer-based photovoltaics. The current-matching limitation of a tandem photovoltaic structure connected in series limits the highest output current and open-circuit voltage of the device and, thus, its performance for the illumination of lower intensity light.

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