Near-infrared absorbing non-fullerene acceptors with unfused D-A-D core for efficient organic solar cells
Source abstract
Abstract
Abstract Two non-fullerene acceptors based on D-A-D-type unfused central units, i.e., BCPDT-1 and BCPDT-2, were synthesized, employing 3-bis(4-(2-ethylhexyl)-thiophen-2-yl)-5,7-bis(2ethylhexyl)benzo-[1,2:4,5-c′]-dithiophene-4,8-dione (BDD) unit as the A moiety and 4,4-dialkyl-4H-cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) unit as the D moiety. The two molecules possess identical backbones, but carry different side chains (octyl for BCPDT-1 and 2-ethylhexyl for BCPDT-2) on CPDT units. Both BCPDT-1 and BCPDT-2 presented broad absorption extending to near-infrared region with optical band gaps of 1.36 and 1.39 eV, respectively. Organic solar cells (OSCs) were fabricated with PBDB-T as donor and BCPDT-1 or BCPDT-2 as acceptor. The devices based on BCPDT-2 exhibited efficient exciton dissociation and charge collection as well as weak charge recombination, attributed to the proper film morphology with nano-scale phase separation and favorable molecular orientation. Consequently, the BCPDT-2 based device displayed a higher power conversion efficiency (PCE) of 10.65%, while the BCPDT-1 based device showed an inferior PCE of 7.54%.
Source: openaire · Quality: candidate unverified · Source record ↗
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.
References (64)
Show source-provided references
1. Polymer photovoltaic cells: enhanced efficiencies via a network of internal donor-acceptor heterojunctions10.1126/science.270.5243.1789 ↗
2. Organic and solution-processed tandem solar cells with 17.3% efficiency10.1126/science.aat2612 ↗
3. Polymer solar cells10.1038/nphoton.2012.11 ↗
4. Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure10.1038/nphoton.2012.190 ↗
5. Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cells10.1038/ncomms6293 ↗
6. Single-junction polymer solar cells with high efficiency and photovoltage10.1038/nphoton.2015.6 ↗
7. Recent advances in bulk heterojunction polymer solar cells10.1021/acs.chemrev.5b00098 ↗
8. Constructing high-performance organic photovoltaics via emerging non-fullerene acceptors and tandem-junction structure10.1002/aenm.202000746 ↗
9. An electron acceptor challenging fullerenes for efficient polymer solar cells10.1002/adma.201404317 ↗
10. Molecular optimization enables over 13% efficiency in organic solar cells10.1021/jacs.7b02677 ↗
11. Energy-level modulation of small-molecule electron acceptors to achieve over 12% efficiency in polymer solar cells10.1002/adma.201602776 ↗
12. Significant influence of the methoxyl substitution position on optoelectronic properties and molecular packing of small-molecule electron acceptors for photovoltaic cells10.1002/aenm.201700183 ↗
13. Achieving highly efficient nonfullerene organic solar cells with improved intermolecular interaction and open-circuit voltage10.1002/adma.201700254 ↗
14. Over 14% efficiency in organic solar cells enabled by chlorinated nonfullerene small-molecule acceptors10.1002/adma.201800613 ↗
15. Next-generation organic photovoltaics based on non-fullerene acceptors10.1038/s41566-018-0104-9 ↗
16. Non-fullerene acceptors for organic solar cells10.1038/natrevmats.2018.3 ↗
17. A facile planar fused-ring electron acceptor for as-cast polymer solar cells with 8.71% efficiency10.1021/jacs.6b00853 ↗
18. Fused nonacyclic electron acceptors for efficient polymer solar cells10.1021/jacs.6b12755 ↗
19. Enhancing the performance of a fused-ring electron acceptor by unidirectional extension10.1021/jacs.9b08988 ↗
20. New thieno[3,2-b]thiophene-based acceptor: tuning acceptor strength of ladder-type N-type materials to simultaneously achieve enhanced Voc and Jsc of nonfullerene solar cells10.1021/acsenergylett.8b00563 ↗
21. High-performance ternary organic solar cells with photoresponses beyond 1000 nm10.1039/C8TA09042D ↗
22. Tuning of the conformation of asymmetric nonfullerene acceptors for efficient organic solar cells10.1039/C9TA07634D ↗
23. Butterfly effects arising from starting materials in fused-ring electron acceptors10.1021/jacs.0c09800 ↗
24. 26 mA cm−2 Jsc from organic solar cells with a low-bandgap nonfullerene acceptor10.1016/j.scib.2017.10.017 ↗
25. Small-Molecule acceptor based on the heptacyclic benzodi(cyclopentadithiophene) unit for highly efficient nonfullerene organic solar cells10.1021/jacs.7b01170 ↗
26. Efficient organic solar cells with non-fullerene acceptors10.1002/smll.201701120 ↗
27. Fused-ring electron acceptors for photovoltaics and beyond10.1021/acs.accounts.0c00575 ↗
28. Single-Junction organic solar cell with over 15% efficiency using fused-ring acceptor with electron-deficient core10.1016/j.joule.2019.01.004 ↗
29. n-Type molecular photovoltaic materials: design strategies and device applications10.1021/jacs.0c04084 ↗
30. New phase for organic solar cell research: emergence of Y-series electron acceptors and their perspectives10.1021/acsenergylett.0c00537 ↗
31. A-DA′D-A non-fullerene acceptors for high-performance organic solar cells10.1007/s11426-020-9799-4 ↗
32. Tuning terminal aromatics of electron acceptors to achieve high-efficiency organic solar cells10.1039/C9TA11285E ↗
33. Alkyl chain tuning of small molecule acceptors for efficient organic solar cells10.1016/j.joule.2019.09.010 ↗
34. Organic photovoltaic cell with 17% efficiency and superior processability10.1093/nsr/nwz200 ↗
35. Single-Junction organic photovoltaic cells with approaching 18% efficiency10.1002/adma.201908205 ↗
36. 18% Efficiency organic solar cells10.1016/j.scib.2020.01.001 ↗
37. Rationally pairing photoactive materials for high-performance polymer solar cells with efficiency of 16.53%10.1007/s11426-019-9599-1 ↗
38. Exploiting noncovalently conformational locking as a design strategy for high performance fused-ring electron acceptor used in polymer solar cells10.1021/jacs.7b00566 ↗
39. An unfused-core-based nonfullerene acceptor enables high-efficiency organic solar cells with excellent morphological stability at high temperatures10.1002/adma.201705208 ↗
40. Nonfullerene acceptors with enhanced solubility and ordered packing for high-efficiency polymer solar cells10.1021/acsenergylett.8b00928 ↗
41. Small molecule acceptors with a nonfused architecture for high-performance organic photovoltaics10.1021/acs.chemmater.8b04087 ↗
42. Simple non-fused electron acceptors for efficient and stable organic solar cells10.1038/s41467-019-10098-z ↗
43. A near-infrared photoactive morphology modifier leads to significant current improvement and energy loss mitigation for ternary organic solar cells10.1002/advs.201800755 ↗
44. Enhanced charge transfer between fullerene and non-fullerene acceptors enables highly efficient ternary organic solar cells10.1021/acsami.8b16131 ↗
45. A fully non-fused ring acceptor with planar backbone and near-IR absorption for high performance polymer solar cells10.1002/anie.202010856 ↗
46. Noncovalently fused-ring electron acceptors with near-infrared absorption for high-performance organic solar cells10.1038/s41467-019-11001-6 ↗
47. Enhanced intramolecular charge transfer of unfused electron acceptors for efficient organic solar cells10.1039/C8QM00609A ↗
48. Nonfused nonfullerene acceptors with an A−D−A′−D−A framework and a benzothiadiazole core for high-performance organic solar cells10.1021/acsami.0c01850 ↗
49. Near-infrared electron acceptors with unfused architecture for efficient organic solar cells10.1021/acsami.0c00837 ↗
50. Small molecule acceptors with a ladder-like core for high-performance organic solar cells with low non-radiative energy losses10.1039/D0TA03683H ↗
51. A2-D-A1-D-A2-type small molecule acceptors incorporated with electron-deficient core for non-fullerene organic solar cells10.1016/j.solener.2020.01.032 ↗
52. Effects of π-bridge on fused-ring electron acceptor dimers10.1021/acsapm.0c00748 ↗
53. Design, application, and morphology study of a new photovoltaic polymer with strong aggregation in solution state10.1021/ma301900h ↗
54. A large-bandgap conjugated polymer for versatile photovoltaic applications with high performance10.1002/adma.201502110 ↗
55. Fullerene-free polymer solar cells with over 11% efficiency and excellent thermal stability10.1002/adma.201600281 ↗
56. Achieving 12.8% efficiency by simultaneously improving open-circuit voltage and short-circuit current density in tandem organic solar cells10.1002/adma.201606340 ↗
57. Toward efficient polymer solar cells processed by a solution-processed layer-by-layer approach10.1002/adma.201802499 ↗
58. Over 14% efficiency in polymer solar cells enabled by a chlorinated polymer donor10.1002/adma.201800868 ↗
59. Fast charge separation in a non-fullerene organic solar cell with a small driving force10.1038/nenergy.2016.89 ↗
60. Tetrafluoroquinoxaline based polymers for non-fullerene polymer solar cells with efficiency over 9%10.1016/j.nanoen.2016.10.008 ↗
61. Perylene diimides: a thickness-insensitive cathode interlayer for high performance polymer solar cells10.1039/c4ee00022f ↗
62. Recombination in polymer-fullerene bulk heterojunction solar cells10.1103/PhysRevB.82.245207 ↗
63. A high efficiency nonfullerene organic solar cell with optimized crystalline organizations10.1002/adma.201504091 ↗
64. Quantifying bimolecular recombination losses in organic bulk heterojunction solar cells10.1002/adma.201004311 ↗