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  • Yang, JianmingEast China Normal Univ, Peoples R China (author)

Energetics and Energy Loss in 2D Ruddlesden-Popper Perovskite Solar Cells

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-05-12
  • WILEY-V C H VERLAG GMBH,2020
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-166181
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166181URI
  • https://doi.org/10.1002/aenm.202000687DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|National Science Foundation of ChinaNational Natural Science Foundation of China [21875067, 11604099, 51811530011]; Fundamental Research Funds for the Central Universities, Shanghai Ring-Star [19QA1403100]; East China Normal University (ECNU) Multifunctional Platform for Innovation [006]; ECNU future scientist project [WLKXJ2019]; STINT [CH2017-7163]; [SFO-Mat-LiU 2009-00971]
  • 2D Ruddlesden-Popper perovskites (RPPs) are emerging as potential challengers to their 3D counterpart due to superior stability and competitive efficiency. However, the fundamental questions on energetics of the 2D RPPs are not well understood. Here, the energetics at (PEA)(2)(MA)(n)-1PbnI3n+1/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) interfaces with varying n values of 1, 3, 5, 40, and infinity are systematically investigated. It is found that n-n junctions form at the 2D RPP interfaces (n = 3, 5, and 40), instead of p-n junctions in the pure 2D and 3D scenarios (n = 1 and infinity). The potential gradient across phenethylammonium iodide ligands that significantly decreases surface work function, promotes separation of the photogenerated charge carriers with electron transferring from perovskite crystal to ligand at the interface, reducing charge recombination, which contributes to the smallest energy loss and the highest open-circuit voltage (V-oc) in the perovskite solar cells (PSCs) based on the 2D RPP (n = 5)/PCBM. The mechanism is further verified by inserting a thin 2D RPP capping layer between pure 3D perovskite and PCBM in PSCs, causing the V-oc to evidently increase by 94 mV. Capacitance-voltage measurements with Mott-Schottky analysis demonstrate that such V-oc improvement is attributed to the enhanced potential at the interface.

Subject headings and genre

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  • Xiong, ShaobingEast China Normal Univ, Peoples R China (author)
  • Song, JingnanShanghai Jiao Tong Univ, Peoples R China (author)
  • Wu, HongboDonghua Univ, Peoples R China (author)
  • Zeng, YihanEast China Normal Univ, Peoples R China (author)
  • Lu, LinyangSoochow Univ, Peoples R China (author)
  • Shen, KongchaoSoochow Univ, Peoples R China (author)
  • Hao, TianyuShanghai Jiao Tong Univ, Peoples R China (author)
  • Ma, ZaifeiDonghua Univ, Peoples R China (author)
  • Liu, FengShanghai Jiao Tong Univ, Peoples R China (author)
  • Duan, ChungangEast China Normal Univ, Peoples R China; Shanxi Univ, Peoples R China (author)
  • Fahlman, MatsLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)matfa21 (author)
  • Bao, QinyeLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,East China Normal Univ, Peoples R China; Shanxi Univ, Peoples R China(Swepub:liu)qinba41 (author)
  • East China Normal Univ, Peoples R ChinaShanghai Jiao Tong Univ, Peoples R China (creator_code:org_t)

Related titles

  • In:Advanced Energy Materials: WILEY-V C H VERLAG GMBH10:231614-68321614-6840

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