2018年6月13日
Highly Efficient 17.6% Tin-Lead Mixed Perovskite Solar Cells Realized through Spike Structure
Nano Letters
- 巻
- 18
- 号
- 6
- 開始ページ
- 3600
- 終了ページ
- 3607
- DOI
- 10.1021/acs.nanolett.8b00701
© 2018 American Chemical Society. Frequently observed high Voc loss in tin-lead mixed perovskite solar cells is considered to be one of the serious bottle-necks in spite of the high attainable Jsc due to wide wavelength photon harvesting. An amicable solution to minimize the Voc loss up to 0.50 V has been demonstrated by introducing an n-type interface with spike structure between the absorber and electron transport layer inspired by highly efficient Cu(In,Ga)Se2 solar cells. Introduction of a conduction band offset of ∼0.15 eV with a thin phenyl-C61-butyric acid methyl ester layer (∼25 nm) on the top of perovskite absorber resulted into improved Voc of 0.75 V leading to best power conversion efficiency of 17.6%. This enhancement is attributed to the facile charge flow at the interface owing to the reduction of interfacial traps and carrier recombination with spike structure as evidenced by time-resolved photoluminescence, nanosecond transient absorption, and electrochemical impedance spectroscopy measurements.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.nanolett.8b00701
- ISSN : 1530-6984
- eISSN : 1530-6992
- PubMed ID : 29701473
- SCOPUS ID : 85046544771