The DOI matches its Crossref record; 53 of the 53 references it cites were found in a registry or an index.
Multifunctional Chemical Linker Imidazoleacetic Acid Hydrochloride for 21% Efficient and Stable Planar Perovskite Solar Cells
Abstract
Chemical interaction at a heterojunction interface induced by an appropriate chemical linker is of crucial importance for high efficiency, hysteresis‐less, and stable perovskite solar cells (PSCs). Effective interface engineering in PSCs is reported via a multifunctional chemical linker of 4‐imidazoleacetic acid hydrochloride (ImAcHCl) that can provide a chemical bridge between SnO 2 and perovskite through an ester bond with SnO 2 via esterification reaction and an electrostatic interaction with perovskite via imidazolium cation in ImAcHCl and iodide anion in perovskite. In addition, the chloride anion in ImAcHCl plays a role in the improvement of crystallinity of perovskite film crystallinity. The introduction of ImAcHCl onto SnO 2 realigns the positions of the conduction and valence bands upwards, reduces nonradiative recombination, and improves carrier life time. As a consequence, average power conversion efficiency (PCE) is increased from 18.60% ± 0.50% to 20.22% ± 0.34% before and after surface modification, respectively, which mainly results from an enhanced voltage from 1.084 ± 0.012 V to 1.143 ± 0.009 V. The best PCE of 21% is achieved by 0.1 mg mL−1 ImAcHCl treatment, along with negligible hysteresis. Moreover, an unencapsulated device with ImAcHCl‐modified SnO 2 shows much better thermal and moisture stability than unmodified SnO 2.
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Self-citationLong-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH 3 NH 3 PbI 3
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Metadata
- Authors
- Chen, J., Zhao, X., Kim, S., & Park, N.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2019-08-12
- Volume
- 31
- Issue
- 39
- Pages
- e1902902-e1902902
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2968806744
- Cited by
- 527
- References
- 53
- FWCI
- 21.59
- Type
- journal article
- Language
- en
- Open access
- closed
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