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Efficient Tandem Organic Photovoltaics with Tunable Rear Sub-cells

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Presentation on theme: "Efficient Tandem Organic Photovoltaics with Tunable Rear Sub-cells"— Presentation transcript:

1 Efficient Tandem Organic Photovoltaics with Tunable Rear Sub-cells
Pei Cheng, Yuqiang Liu, Sheng-Yung Chang, Tengfei Li, Pengyu Sun, Rui Wang, Hao-Wen Cheng, Tianyi Huang, Lei Meng, Selbi Nuryyeva, Chenhui Zhu, Kung-Hwa Wei, Baoquan Sun, Xiaowei Zhan, Yang Yang  Joule  Volume 3, Issue 2, Pages (February 2019) DOI: /j.joule Copyright © 2018 Elsevier Inc. Terms and Conditions

2 Joule 2019 3, DOI: ( /j.joule ) Copyright © 2018 Elsevier Inc. Terms and Conditions

3 Figure 1 Molecular Structures and Film Absorption
(A) Molecular (donor) structures of PBDB-T and PTB7-Th. (B) Molecular (acceptor) structures of IT-M, FOIC, and F8IC. (C) Film absorption spectra of PBDB-T, PTB7-Th, IT-M, FOIC, and F8IC. Joule 2019 3, DOI: ( /j.joule ) Copyright © 2018 Elsevier Inc. Terms and Conditions

4 Figure 2 Photovoltaic Characteristics of Single-Junction Devices
(A) J-V curves of single-junction devices under illumination of an AM 1.5G solar simulator, 100 mW cm−2. (B) EQE spectra of single-junction devices. Joule 2019 3, DOI: ( /j.joule ) Copyright © 2018 Elsevier Inc. Terms and Conditions

5 Figure 3 Molecular Packing Behaviors
2D GIWAXS patterns of PTB7-Th/FOIC/F8IC blends in different rear sub-cells. Joule 2019 3, DOI: ( /j.joule ) Copyright © 2018 Elsevier Inc. Terms and Conditions

6 Figure 4 Device Structure, Energy Alignments, and Photovoltaic Characteristics of Tandem Devices (A) Device structure. (B) Energy levels of donor and acceptor materials, and work functions of interlayers. (C) J-V curve of tandem device (based on Rear 3 sub-cell) under illumination of an AM 1.5 G solar simulator, 100 mW cm−2. (D) EQE spectra of tandem device (based on Rear 3 sub-cell). (E) Photovoltaic characteristics of tandem device (based on Rear 3 sub-cell) with the NREL certification (asymptotic scans on encapsulated devices). Joule 2019 3, DOI: ( /j.joule ) Copyright © 2018 Elsevier Inc. Terms and Conditions

7 Figure 5 Light-Field Simulations
(A) The light-field distribution of the tandem device based on Rear 3 (125 nm for front sub-cell and 80 nm for rear sub-cell). (B) Generation rate of the tandem device based on Rear 3 (125 nm for front sub-cell and 80 nm for rear sub-cell). Joule 2019 3, DOI: ( /j.joule ) Copyright © 2018 Elsevier Inc. Terms and Conditions

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