Ascorbic acid as an effective antioxidant additive to enhance the efficiency and stability of Pb/Sn-based binary perovskite solar cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Xiaobao Xu
  • Chu-Chen Chueh
  • Zhibin Yang
  • Adharsh Rajagopal
  • Jingqi Xu
  • Sae Byeok Jo

Detail(s)

Original languageEnglish
Pages (from-to)392-398
Journal / PublicationNano Energy
Volume34
Online published22 Feb 2017
Publication statusPublished - Apr 2017

Abstract

Realizing efficient organic/inorganic hybrid perovskite solar cells (PVSCs) with reduced toxic lead (Pb) content is important for developing sustainable clean photovoltaics. The vigorous progress made recently for tin (Sn)- and Pb/Sn-based PVSCs has drawn considerable attention because of their potential to reduce Pb content in perovskites. However, the inferior chemical stability of Sn to Pb element necessitates more sophisticated morphological and processing engineering of Sn-containing PVSCs in order to achieve high performance and stability. We have recently discovered that ascorbic acid (AA) can serve as a simple but effective additive to simultaneously enhance the performance and stability of Sn-containing PVSCs. It is revealed that AA as a commonly known antioxidant can retard the oxidation of Sn-containing precursor solution of perovskite while modulate its perovskite crystallization by forming intermediate complexes. This is evidenced by the prolonged photogenerated carrier lifetime (182.7 ns) of its derived MA0.5FA0.5Pb0.5Sn0.5I3 film. As a result, a high PCE of 14.01% with improved stability can be realized in the binary metal PVSC with AA as additive, outperforming the value (12.18%) of the control device processed with the regular SnF2 additive.

Research Area(s)

  • Ascorbic acid, Perovskite solar cell, Sn2+ oxidation, Stability

Citation Format(s)

Ascorbic acid as an effective antioxidant additive to enhance the efficiency and stability of Pb/Sn-based binary perovskite solar cells. / Xu, Xiaobao; Chueh, Chu-Chen; Yang, Zhibin; Rajagopal, Adharsh; Xu, Jingqi; Jo, Sae Byeok; Jen, Alex K.-Y.

In: Nano Energy, Vol. 34, 04.2017, p. 392-398.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal