Abstract
Suppressing the trap-state density and the energy loss via ternary strategy was demonstrated. Favorable vertical phase distribution with donors (acceptors) accumulated (depleted) at the interface of active layer and charge extraction layer can be obtained by introducing appropriate amount of polymer acceptor N2200 into the systems of PBDB-T:IT-M and PBDB-TF:Y6. In addition, N2200 is gradiently distributed in the vertical direction in the ternary blend film. Various measurements were carried out to study the effects of N2200 on the binary systems. It was found that the optimized morphology especially in vertical direction can significantly decrease the trap state density of the binary blend films, which is beneficial for the charge transport and collection. All these features enable an obvious decrease in charge recombination in both PBDB-T:IT-M and PBDB-TF:Y6 based organic solar cells (OSCs), and power conversion efficiencies (PCEs) of 12.5% and 16.42% were obtained for the ternary OSCs, respectively. This work indicates that it is an effective method to suppress the trap state density and thus improve the device performance through ternary strategy.
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Hou J, Inganäs O, Friend RH, Gao F. Nat Mater, 2018, 17: 119–128
Sun H, Guo X, Facchetti A. Chem, 2020, 6: 1310–1326
Lin Y, Wang J, Zhang ZG, Bai H, Li Y, Zhu D, Zhan X. Adv Mater, 2015, 27: 1170–1174
Yuan J, Zhang Y, Zhou L, Zhang G, Yip HL, Lau TK, Lu X, Zhu C, Peng H, Johnson PA, Leclerc M, Cao Y, Ulanski J, Li Y, Zou Y. Joule, 2019, 3: 1140–1151
Cui Y, Yao H, Hong L, Zhang T, Tang Y, Lin B, Xian K, Gao B, An C, Bi P, Ma W, Hou J. Natl Sci Rev, 2020, 7: 1239–1246
Meng L, Zhang Y, Wan X, Li C, Zhang X, Wang Y, Ke X, Xiao Z, Ding L, Xia R, Yip HL, Cao Y, Chen Y. Science, 2018, 361: 1094–1098
Liu Q, Jiang Y, Jin K, Qin J, Xu J, Li W, Xiong J, Liu J, Xiao Z, Sun K, Yang S, Zhang X, Ding L. Sci Bull, 2020, 65: 272–275
Vollbrecht J, Brus VV, Ko S, Lee J, Karki A, Cao DX, Cho K, Bazan GC, Nguyen T. Adv Energy Mater, 2019, 9: 1901438
Menke SM, Ran NA, Bazan GC, Friend RH. Joule, 2018, 2: 25–35
Hou T, Liu F, Wang Z, Zhang Y, Wei Q, Li B, Zhang S, Xing G. Adv Opt Mater, 2018, 6: 1800027
Kotadiya NB, Mondal A, Blom PWM, Andrienko D, Wetzelaer GJAH. Nat Mater, 2019, 18: 1182–1186
Yu R, Yao H, Cui Y, Hong L, He C, Hou J. Adv Mater, 2019, 31: 1902302
Rubel O, Baranovskii SD, Stolz W, Gebhard F. Phys Rev Lett, 2008, 100: 196602
He Y, Heumüller T, Lai W, Feng G, Classen A, Du X, Liu C, Li W, Li N, Brabec CJ. Adv Energy Mater, 2019, 9: 1900409
Song X, Gasparini N, Nahid MM, Chen H, Macphee SM, Zhang W, Norman V, Zhu C, Bryant D, Ade H, McCulloch I, Baran D. Adv Funct Mater, 2018, 28: 1802895
Zhou K, Liu Y, Alotaibi A, Yuan J, Jiang C, Xin J, Liu X, Collins BA, Zhang F, Ma W. ACS Energy Lett, 2020, 5: 589–596
Bi P, Xiao T, Yang X, Niu M, Wen Z, Zhang K, Qin W, So SK, Lu G, Hao X, Liu H. Nano Energy, 2018, 46: 81–90
Yan Y, Liu X, Wang T. Adv Mater, 2017, 29: 1601674
Wang G, Melkonyan FS, Facchetti A, Marks TJ. Angew Chem Int Ed, 2019, 58: 4129–4142
Li W, Ye L, Li S, Yao H, Ade H, Hou J. Adv Mater, 2018, 30: 1707170
Comyn J. Int J Adhes Adhes, 1992, 12: 145–149
Li W, Chen M, Cai J, Spooner ELK, Zhang H, Gurney RS, Liu D, Xiao Z, Lidzey DG, Ding L, Wang T. Joule, 2019, 3: 819–833
Du B, Geng R, Li W, Li D, Mao Y, Chen M, Zhang X, Smith JA, Kilbride RC, O’Kane ME, Liu D, Lidzey DG, Tang W, Wang T. ACS Energy Lett, 2019, 4: 2378–2385
Liao HC, Tsao CS, Lin TH, Chuang CM, Chen CY, Jeng US, Su CH, Chen YF, Su WF. J Am Chem Soc, 2011, 133: 13064–13073
Liang Q, Han J, Song C, Yu X, Smilgies DM, Zhao K, Liu J, Han Y. J Mater Chem A, 2018, 6: 15610–15620
An Q, Zhang J, Gao W, Qi F, Zhang M, Ma X, Yang C, Huo L, Zhang F. Small, 2018, 14: 1802983
Xie Y, Yang F, Li Y, Uddin MA, Bi P, Fan B, Cai Y, Hao X, Woo HY, Li W, Liu F, Sun Y. Adv Mater, 2018, 30: 1803045
Zuo G, Linares M, Upreti T, Kemerink M. Nat Mater, 2019, 18: 588–593
Eisner FD, Azzouzi M, Fei Z, Hou X, Anthopoulos TD, Dennis TJS, Heeney M, Nelson J. J Am Chem Soc, 2019, 141: 6362–6374
Vezie MS, Azzouzi M, Telford AM, Hopper TR, Sieval AB, Hummelen JC, Fallon K, Bronstein H, Kirchartz T, Bakulin AA, Clarke TM, Nelson J. ACS Energy Lett, 2019, 4: 2096–2103
Cui Y, Yao H, Zhang J, Zhang T, Wang Y, Hong L, Xian K, Xu B, Zhang S, Peng J, Wei Z, Gao F, Hou J. Nat Commun, 2019, 10: 2515
Li G, Chu CW, Shrotriya V, Huang J, Yang Y. Appl Phys Lett, 2006, 88: 253503
Xu Z, Chen LM, Yang G, Huang CH, Hou J, Wu Y, Li G, Hsu CS, Yang Y. Adv Funct Mater, 2009, 19: 1227–1234
Li D, Chen X, Cai J, Li W, Chen M, Mao Y, Du B, Smith JA, Kilbride RC, O’Kane ME, Zhang X, Zhuang Y, Wang P, Wang H, Liu D, Jones RAL, Lidzey DG, Wang T. Sci China Chem, 2020, 63: 1461–1468
Acknowledgements
This work was supported by the National Natural Science Foundation of China (21835006, 21704004), the Fundamental Research Funds for the Central Universities, China (FRF-TP-19-047A2), and China Postdoctoral Science Foundation (2019M660799).
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Suppressing Trap States and Energy Loss by Optimizing Vertical Phase Distribution through Ternary Strategy in Organic Solar Cells
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Bi, P., Zhang, S., Xiao, T. et al. Suppressing trap states and energy loss by optimizing vertical phase distribution through ternary strategy in organic solar cells. Sci. China Chem. 64, 599–607 (2021). https://doi.org/10.1007/s11426-020-9926-x
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DOI: https://doi.org/10.1007/s11426-020-9926-x