journal article·2021-10-08

Healing the Buried Cavities and Defects in Quasi-2D Perovskite Films by Self-Generated Methylamine Gas

Jifei Wang, Shiqiang Luo, Xianglan Tang, Si Xiao, Zhihui Chen, Shuping Pang, Lin Zhang, Yun Lin, Jun He, Yongbo Yuan

ACS Energy Letters· Volume 6· Issue 10
Publisher page

Abstract

Perovskites with grain size comparable to film thickness are intensively pursued for high-efficiency solar cells. Geometrically, large grains with high crystallinity tend to form polyhedral shapes that have difficulty forming compact and smooth films. When quasi-two-dimensional RP perovskite films adopt a downward growth mode, defective contacts tend to form at their bottom interfaces with many nanocavities. This is attributed to the angular growing fronts of RP perovskite grains adopting [111] (or/and [101]) growth directions. Self-generated methylamine gas, by a replacement reaction in solution, is introduced to in situ heal these irregular nanocavities that are deeply buried in perovskite films during crystallization processes. The amount of self-generated methylamine gas should be adequately controlled to avoid the homogeneous nucleation of perovskites from a liquid perovskite-amine intermediate phase, which is a key to avoid ruining the grain size and film composition. This in situ healing strategy offers significantly enhanced charge collection efficiency and device working stability.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics and Electronics, Hunan Key Laboratory of Nanophotonics and Devices, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, P.R. China

Hunan Key Laboratory of Super Microstructure and Ultrafast Process, Central South University, Changsha, Hunan 410083, P.R. China

Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101, P.R. China

Funding

Hunan Provincial Science and Technology Department · Natural Science Foundation of??Hunan Province · China Postdoctoral Science Foundation · Education Department of Hunan Province · National Natural Science Foundation of China · Innovation???Driven Project of Central South University · Changsha Municipal Natural Science Foundation · Open Sharing Fund for the Large-scale Instruments and Equipment of Central South University

References (47)

Show source-provided references
1. 10.1002/ange.20140646610.1002/ange.201406466 ↗
2. 10.1021/jacs.5b0379610.1021/jacs.5b03796 ↗
3. 10.1038/nature1830610.1038/nature18306 ↗
4. 10.1016/j.joule.2018.07.00710.1016/j.joule.2018.07.007 ↗
5. 10.1039/D0EE02017F10.1039/D0EE02017F ↗
6. 10.1007/s40820-021-00672-w10.1007/s40820-021-00672-w ↗
7. 10.1021/acsenergylett.7b0044210.1021/acsenergylett.7b00442 ↗
8. 10.1021/acsenergylett.8b0004710.1021/acsenergylett.8b00047 ↗
9. 10.1021/acs.chemrev.5b0071510.1021/acs.chemrev.5b00715 ↗
10. 10.1002/solr.20200037110.1002/solr.202000371 ↗
11. 10.1126/sciadv.160216410.1126/sciadv.1602164 ↗
12. 10.1088/1674-4926/42/1/01020110.1088/1674-4926/42/1/010201 ↗
13. 10.1002/aenm.20200255210.1002/aenm.202002552 ↗
14. 10.1002/adma.20190388910.1002/adma.201903889 ↗
15. 10.1038/s41560-020-00721-510.1038/s41560-020-00721-5 ↗
16. 10.1126/science.aaa533310.1126/science.aaa5333 ↗
17. 10.1039/C8CS00853A10.1039/C8CS00853A ↗
18. 10.1038/s41467-018-04430-210.1038/s41467-018-04430-2 ↗
19. 10.1088/1361-6463/abd72810.1088/1361-6463/abd728 ↗
20. 10.1038/s41467-018-03757-010.1038/s41467-018-03757-0 ↗
21. 10.1038/s41467-019-13856-110.1038/s41467-019-13856-1 ↗
22. 10.1021/acs.chemmater.6b0084710.1021/acs.chemmater.6b00847 ↗
23. 10.1039/C9TC03490K10.1039/C9TC03490K ↗
24. 10.1002/solr.20170007610.1002/solr.201700076 ↗
25. 10.1002/ange.20150437910.1002/ange.201504379 ↗
26. 10.1038/nature2387710.1038/nature23877 ↗
27. 10.1038/s41467-018-06317-810.1038/s41467-018-06317-8 ↗
28. 10.1002/adma.20190424310.1002/adma.201904243 ↗
29. 10.1002/adma.20160306210.1002/adma.201603062 ↗
30. 10.1002/lpor.20180006010.1002/lpor.201800060 ↗
31. 10.1039/C6RA03485C10.1039/C6RA03485C ↗
32. 10.1021/acsami.6b1517510.1021/acsami.6b15175 ↗
33. 10.1038/ncomms874710.1038/ncomms8747 ↗
34. 10.1038/nature2387710.1038/nature23877 ↗
35. 10.1016/j.joule.2020.03.00710.1016/j.joule.2020.03.007 ↗
36. 10.1039/D0EE01845G10.1039/D0EE01845G ↗
37. 10.1002/adfm.20210093110.1002/adfm.202100931 ↗
38. 10.1126/sciadv.abg374910.1126/sciadv.abg3749 ↗
39. 10.1002/advs.20200244510.1002/advs.202002445 ↗
40. 10.1021/jp903764910.1021/jp9037649 ↗
41. 10.1002/aenm.20170249810.1002/aenm.201702498 ↗
42. 10.1002/adma.20200643510.1002/adma.202006435 ↗
43. 10.1126/science.abi632310.1126/science.abi6323 ↗
44. 10.1002/aenm.20150180310.1002/aenm.201501803 ↗
45. 10.1021/acs.jpclett.7b0267910.1021/acs.jpclett.7b02679 ↗
46. 10.1021/acsnano.5b0704310.1021/acsnano.5b07043 ↗
47. 10.1021/jacs.6b1258110.1021/jacs.6b12581 ↗