Understanding the Role of Order in Y‐Series Non‐Fullerene Solar Cells to Realize High Open‐Circuit Voltages
Source abstract
Abstract
Abstract Non‐fullerene acceptors (NFAs) as used in state‐of‐the‐art organic solar cells feature highly crystalline layers that go along with low energetic disorder. Here, the crucial role of energetic disorder in blends of the donor polymer PM6 with two Y‐series NFAs, Y6, and N4 is studied. By performing temperature‐dependent charge transport and recombination studies, a consistent picture of the shape of the density of state distributions for free charges in the two blends is developed, allowing an analytical description of the dependence of the open‐circuit voltage VOC on temperature and illumination intensity. Disorder is found to influence the value of the VOC at room temperature, but also its progression with temperature. Here, the PM6:Y6 blend benefits substantially from its narrower state distributions. The analysis also shows that the energy of the equilibrated free charge population is well below the energy of the NFA singlet excitons for both blends and possibly below the energy of the populated charge transfer manifold, indicating a down‐hill driving force for free charge formation. It is concluded that energetic disorder of charge‐separated states has to be considered in the analysis of the photovoltaic properties, even for the more ordered PM6:Y6 blend.
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Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Soft Matter Physics and Optoelectronics Institute of Physics and Astronomy University of Potsdam Karl‐Liebknecht‐Str. 24–25 14476 Potsdam‐Golm Germany
Disordered Semiconductor Optoelectronics, Institute of Physics and Astronomy University of Potsdam Karl‐Liebknecht‐Str. 24–25 14476 Potsdam‐Golm Germany
Physikalisches Institut Dynamik und Strukturbildung – Herzig Group Universität Bayreuth Universitätsstr. 30 95447 Bayreuth Germany
NSLS‐II Brookhaven National Laboratory Upton NY 11973 USA
KAUST Solar Center (KSC) Physical Sciences and Engineering Division (PSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Kingdom of Saudi Arabia
College of Chemistry and Chemical Engineering Central South University Changsha 410083 P. R. China
Sustainable Advanced Materials (Sêr SAM) Department of Physics Swansea University Singleton Park Swansea SA2 8PP UK
Soft Matter Optoelectronics Bayreuth Institut of Macromolecular Research (BIMF) and Bavarian Polymer Institute (BPI) University of Bayreuth 95440 Bayreuth Germany
Funding
Deutsche Forschungsgemeinschaft · Elitenetzwerk Bayern · U.S. Department of Energy · Brookhaven National Laboratory · King Abdullah University of Science and Technology · National Natural Science Foundation of China · European Regional Development Fund · Office of Science
References (89)
Show source-provided references
1. 10.1002/aenm.20200357010.1002/aenm.202003570 ↗
2. 10.1016/j.scib.2020.01.00110.1016/j.scib.2020.01.001 ↗
3. 10.1002/adma.20190820510.1002/adma.201908205 ↗
4. 10.1021/acsenergylett.0c0142110.1021/acsenergylett.0c01421 ↗
5. 10.1002/aenm.20210170510.1002/aenm.202101705 ↗
6. 10.1002/adma.20210083010.1002/adma.202100830 ↗
7. 10.1016/j.joule.2019.01.00410.1016/j.joule.2019.01.004 ↗
8. 10.1002/adma.20190676310.1002/adma.201906763 ↗
9. 10.1038/s41467-020-17867-110.1038/s41467-020-17867-1 ↗
10. 10.1002/aenm.20190423410.1002/aenm.201904234 ↗
11. 10.1039/D1TA04623C10.1039/D1TA04623C ↗
12. 10.1016/j.mtadv.2021.10015410.1016/j.mtadv.2021.100154 ↗
13. 10.1002/aenm.20210080410.1002/aenm.202100804 ↗
14. 10.1039/D0EE01338B10.1039/D0EE01338B ↗
15. 10.1002/solr.20200049810.1002/solr.202000498 ↗
16. 10.1002/pssb.222175010210.1002/pssb.2221750102 ↗
17. 10.1002/pssb.20135033910.1002/pssb.201350339 ↗
18. 10.1063/1.488331810.1063/1.4883318 ↗
19. 10.1021/acs.jpcc.7b0776810.1021/acs.jpcc.7b07768 ↗
20. 10.1103/PhysRevB.84.07521010.1103/PhysRevB.84.075210 ↗
21. 10.1021/jz300293q10.1021/jz300293q ↗
22. 10.1002/aenm.20150172110.1002/aenm.201501721 ↗
23. 10.1063/1.320238910.1063/1.3202389 ↗
24. 10.1063/1.335812110.1063/1.3358121 ↗
25. 10.1103/PhysRevB.83.11520910.1103/PhysRevB.83.115209 ↗
26. 10.1021/ja201837e10.1021/ja201837e ↗
27. 10.1103/PhysRevB.86.16520110.1103/PhysRevB.86.165201 ↗
28. 10.1021/acs.jpclett.9b0051610.1021/acs.jpclett.9b00516 ↗
29. 10.1021/acs.jpclett.9b0214410.1021/acs.jpclett.9b02144 ↗
30. 10.1002/adfm.20140040410.1002/adfm.201400404 ↗
31. 10.1038/ncomms977810.1038/ncomms9778 ↗
32. 10.1002/aenm.20160214310.1002/aenm.201602143 ↗
33. 10.1103/PhysRevApplied.12.06403910.1103/PhysRevApplied.12.064039 ↗
34. 10.1038/s41467-018-04386-310.1038/s41467-018-04386-3 ↗
35. 10.1002/adfm.20130091810.1002/adfm.201300918 ↗
36. 10.1021/acs.jpclett.5b0170910.1021/acs.jpclett.5b01709 ↗
37. 10.1002/aenm.20200114910.1002/aenm.202001149 ↗
38. 10.1038/s41566-019-0573-510.1038/s41566-019-0573-5 ↗
39. 10.1007/s11426-020-9747-910.1007/s11426-020-9747-9 ↗
40. 10.1103/PhysRevB.96.24520410.1103/PhysRevB.96.245204 ↗
41. 10.1002/adfm.20170565910.1002/adfm.201705659 ↗
42. 10.1002/aenm.20200309110.1002/aenm.202003091 ↗
43. 10.1039/D0TA06907H10.1039/D0TA06907H ↗
44. 10.1039/D0TA01260B10.1039/D0TA01260B ↗
45. 10.1038/s41467-021-24202-910.1038/s41467-021-24202-9 ↗
46. 10.1039/D0EE01896A10.1039/D0EE01896A ↗
47. 10.1021/acs.jpclett.1c0336510.1021/acs.jpclett.1c03365 ↗
48. 10.1016/j.joule.2019.09.01010.1016/j.joule.2019.09.010 ↗
49. 10.1021/acsenergylett.0c0053710.1021/acsenergylett.0c00537 ↗
50. 10.1002/aenm.20130140110.1002/aenm.201301401 ↗
51. 10.1021/acs.jpcc.8b1166910.1021/acs.jpcc.8b11669 ↗
52. 10.1021/acs.jpcc.9b0890110.1021/acs.jpcc.9b08901 ↗
53. 10.1002/solr.20200064910.1002/solr.202000649 ↗
54. 10.1063/1.512903710.1063/1.5129037 ↗
55. 10.1021/acsenergylett.0c0257210.1021/acsenergylett.0c02572 ↗
56. 10.1016/j.joule.2020.07.02810.1016/j.joule.2020.07.028 ↗
57. 10.1002/adma.20190344110.1002/adma.201903441 ↗
58. 10.1063/1.46564010.1063/1.465640 ↗
59. 10.1016/0038-1098(89)90518-810.1016/0038-1098(89)90518-8 ↗
60. 10.1002/adma.20140011410.1002/adma.201400114 ↗
61. 10.1002/aenm.20140092210.1002/aenm.201400922 ↗
62. 10.1103/PhysRevB.76.08530310.1103/PhysRevB.76.085303 ↗
63. 10.1103/PhysRevB.77.03520610.1103/PhysRevB.77.035206 ↗
64. 10.1016/j.orgel.2018.06.01010.1016/j.orgel.2018.06.010 ↗
65. 10.1021/acs.jpcc.7b0175810.1021/acs.jpcc.7b01758 ↗
66. 10.1038/s41563-019-0347-y10.1038/s41563-019-0347-y ↗
67. 10.1063/1.11658310.1063/1.116583 ↗
68. 10.1063/1.308630710.1063/1.3086307 ↗
69. 10.1103/PhysRevB.83.16520410.1103/PhysRevB.83.165204 ↗
70. 10.1002/adfm.20110311810.1002/adfm.201103118 ↗
71. 10.1021/jp402751v10.1021/jp402751v ↗
72. 10.1063/1.337447510.1063/1.3374475 ↗
73. 10.1038/s41467-020-19434-010.1038/s41467-020-19434-0 ↗
74. 10.1063/1.172848710.1063/1.1728487 ↗
75. 10.1002/solr.20200037510.1002/solr.202000375 ↗
76. 10.1103/PhysRevLett.114.12870110.1103/PhysRevLett.114.128701 ↗
77. 10.1002/aenm.20160175010.1002/aenm.201601750 ↗
78. 10.1002/aenm.20150012310.1002/aenm.201500123 ↗
79. 10.1038/s41467-021-23975-310.1038/s41467-021-23975-3 ↗
80. 10.1002/aenm.20170156110.1002/aenm.201701561 ↗
81. 10.1021/acs.jpclett.1c0223510.1021/acs.jpclett.1c02235 ↗
82. 10.1103/PhysRevB.87.11520910.1103/PhysRevB.87.115209 ↗
83. 10.1002/aenm.20180392610.1002/aenm.201803926 ↗
84. 10.1103/PhysRevApplied.16.03402710.1103/PhysRevApplied.16.034027 ↗
85. 10.1021/acs.jpcc.1c0365610.1021/acs.jpcc.1c03656 ↗
86. 10.1002/adfm.20210715710.1002/adfm.202107157 ↗
87. 10.1038/s41563-020-00835-x10.1038/s41563-020-00835-x ↗
88. 10.1021/acs.jpclett.6b0217810.1021/acs.jpclett.6b02178 ↗
89. 10.1021/acs.jpclett.9b0286610.1021/acs.jpclett.9b02866 ↗