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    Journals >Journal of Semiconductors >Volume 42 >Issue 6 >Page 060502 > Article
    • Journal of Semiconductors
    • Vol. 42, Issue 6, 060502 (2021)
    18.69% PCE from organic solar cells
    Ke Jin, Zuo Xiao, and Liming Ding
    Author Affiliations
  • Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China
    • show less
    DOI: 10.1088/1674-4926/42/6/060502 Cite this Article
    Ke Jin, Zuo Xiao, Liming Ding. 18.69% PCE from organic solar cells[J]. Journal of Semiconductors, 2021, 42(6): 060502 Copy Citation Text show less

    Abstract

    Abstract

    The exquisite design and persistent development of fused-ring-acceptor-unit-based copolymer donors and Y-series nonfullerene acceptors (NFAs) have pushed the power conversion efficiencies (PCEs) for organic solar cells onto the 18% level[1-21]. Our group invented copolymer donors D18 and D18-Cl[2, 3]. D18:Y6, D18-Cl:N3 and D18:N3 solar cells have delivered outstanding PCEs of 18.22%, 18.13% and 18.56%, respectively[2-4]. Ternary solar cells based on a polymer donor, a NFA and a fullerene acceptor show great potential since they combine good light-harvesting capability of NFA and good electron-mobility of fullerene[5].

    In this report, the device structure is ITO/PEDOT:PSS/D18-Cl:N3:PC61BM (D:A1:A2)/PDIN/Ag. The D : A1 ratio was fixed at 1 : 1.4 (wt) since D18-Cl:N3 cells gave the best performance at the ratio of 1 : 1.4[3]. We adjusted PC61BM content from 0.1 to 0.2 to 0.3. When D : A1: A2 ratio was 1 : 1.4 : 0.1, the ternary cells gave the highest PCE (Table S1). The champion cells with 0.3 vol% diphenyl ether (DPE) as the additive and an active layer thickness of 114 nm gave the highest PCE of 18.69%, with an open-circuit voltage (Voc) of 0.849 V, a short-circuit current density (Jsc) of 28.22 mA cm–2 and a fill factor (FF) of 78.0% (Table S2, Table S3 and Fig. S1). The external quantum efficiency (EQE) exceeded 80% in 450–840 nm, with a maximum of 91% at 540 nm (Fig. S2). The integrated photocurrent density is 27.24 mA cm–2. The best devices were also measured at the National Institute of Metrology (NIM), Beijing, and a certified PCE of 18.1% (Voc, 0.854 V; Jsc, 27.36 mA cm–2; FF, 77.3%; effective area, 2.580 mm2) was recorded (Fig. S3). To the best of our knowledge, the 18.1% certified efficiency is the highest value reported for organic solar cells to date. Compared with the binary cells, the ternary cells show simultaneously enhanced Jsc and FF, suggesting the improved charge transport in the active layer. We measured hole and electron mobilities (μh and μe) by using the space charge limited current (SCLC) method (Fig. S4, Fig. S5 and Table S4). From binary to ternary blend films, μh didn’t change much while μe increased from 6.32 × 10–4 to 7.42 × 10–4 cm2 V–1 s–1. Fullerene enhanced electron transport and led to more balanced charge transport (Table S4).

    Acknowledgements

    We appreciate the National Key Research and Development Program of China (2017YFA0206600) and the National Natural Science Foundation of China (51773045, 21772030, 51922032, 21961160720) for financial support.

    Appendix A. Supplementary material

    References

    [1] Y Tong, Z Xiao, X Du et al. Progress of the key materials for organic solar cells. Sci China Chem, 63, 758(2020).

    [2] Q Liu, Y Jiang, K Jin et al. 18% efficiency organic solar cells. Sci Bull, 65, 272(2020).

    [3] J Qin, L Zhang, C Zuo et al. A chlorinated copolymer donor demonstrates a 18.13% power conversion efficiency. J Semicond, 42, 010501(2021).

    [4] K Jin, Z Xiao, L Ding. D18, an eximious solar polymer!. J Semicond, 42, 010502(2021).

    [5] Z Xiao, X Jia, L Ding. Ternary organic solar cells offer 14% power conversion efficiency. Sci Bull, 62, 1562(2017).

    [6] C Duan, L Ding. The new era for organic solar cells: non-fullerene small molecular acceptors. Sci Bull, 65, 1231(2020).

    [7] C Duan, L Ding. The new era for organic solar cells: polymer donors. Sci Bull, 65, 1422(2020).

    [8] C Duan, L Ding. The new era for organic solar cells: polymer acceptors. Sci Bull, 65, 1508(2020).

    [9] C Duan, L Ding. The new era for organic solar cells: small molecular donors. Sci Bull, 65, 1597(2020).

    [10] A Armin, W Li, J S Oskar et al. A history and perspective of non-fullerene electron acceptors for organic solar cells. Adv Energy Mater, 11, 20003570(2021).

    [11] Z Xiao, S Yang, Z Yang et al. Carbon-oxygen-bridged ladder-type building blocks for highly efficient nonfullerene acceptors. Adv Mater, 31, 1804790(2019).

    [12] Z Wang, Z Peng, Z Xiao et al. Thermodynamic properties and molecular packing explain performance and processing procedures of three D18:NFA organic solar cells. Adv Mater, 32, 2005386(2020).

    [13] W Li, M Chen, J Cai et al. Molecular order control of non-fullerene acceptors for high-efficiency polymer solar cells. Joule, 3, 819(2019).

    [14] W Li, Z Xiao, J Cai et al. Correlating the electron-donating core structure with morphology and performance of carbon-oxygen-bridged ladder-type non-fullerene acceptor based organic solar cells. Nano Energy, 61, 318(2019).

    [15] T Wang, J Qin, Z Xiao et al. Multiple conformation locks gift polymer donor high efficiency. Nano Energy, 77, 105161(2020).

    [16] J Xiong, K Jin, Y Jiang et al. Thiolactone copolymer donor gifts organic solar cells a 16.72% efficiency. Sci Bull, 64, 1573(2019).

    [17] T Wang, J Qin, Z Xiao et al. A 2.16 eV bandgap polymer donor gives 16% power conversion efficiency. Sci Bull, 65, 179(2020).

    [18] J Qin, L Zhang, Z Xiao et al. Over 16% efficiency from thick-film organic solar cells. Sci Bull, 65, 1979(2020).

    [19] W Guan, D Yuan, J Wu et al. Blade-coated organic solar cells from non-halogenated solvent offer 17% efficiency. J Semicond, 42, 030502(2021).

    [20] W Pan, Y Han, Z Wang et al. Over 1 cm2 flexible organic solar cells. J Semicond, 42, 050301(2021).

    [21] L Liu, Q Liu, Z Xiao et al. Induced J-aggregation in acceptor alloy enhances photocurrent. Sci Bull, 64, 1083(2019).

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    Ke Jin, Zuo Xiao, Liming Ding. 18.69% PCE from organic solar cells[J]. Journal of Semiconductors, 2021, 42(6): 060502
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