Title: An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss

Abstract

Stabilization of the crystal phase of inorganic/organic lead halide perovskites is critical for their high performance optoelectronic devices. However, due to the highly ionic nature of perovskite crystals, even phase stabilized polycrystalline perovskites can undergo undesirable phase transitions when exposed to a destabilizing environment. While various surface passivating agents have been developed to improve the device performance of perovskite solar cells, conventional deposition methods using a protic polar solvent, mainly isopropyl alcohol (IPA), results in a destabilization of the underlying perovskite layer and an undesirable degradation of device properties. We demonstrate the hidden role of IPA in surface treatments and develop a strategy in which the passivating agent is deposited without destabilizing the high quality perovskite underlayer. This strategy maximizes and stabilizes device performance by suppressing the formation of the perovskite δ-phase and amorphous phase during surface treatment, which is observed using conventional methods. Our strategy also effectively passivates surface and grain boundary defects, minimizing non-radiative recombination sites, and preventing carrier quenching at the perovskite interface. This results in an open-circuit-voltage loss of only ~340 mV, a champion device with a power conversion efficiency of 23.4% from a reverse current–voltage scan, a device with a record certified stabilized PCE ofmore » 22.6%, and enhanced operational stability. In addition, our perovskite solar cell exhibits an electroluminescence external quantum efficiency up to 8.9%.« less

Authors:

Yoo, Jason J.  ^[1];

• Search DOE PAGES for author "Yoo, Jason J."
• Search DOE PAGES for ORCID "0000-0002-5773-1360"

Wieghold, Sarah ^[2]; Sponseller, Melany C. ^[3]; Chua, Matthew R. ^[3]; Bertram, Sophie N. ^[1]; Hartono, Noor Titan Putri  ^[2];

• Search DOE PAGES for author "Hartono, Noor Titan Putri"
• Search DOE PAGES for ORCID "0000-0002-0748-0620"

Tresback, Jason S. ^[4]; Hansen, Eric C. ^[1]; Correa-Baena, Juan-Pablo  ^[2];

• Search DOE PAGES for author "Correa-Baena, Juan-Pablo"
• Search DOE PAGES for ORCID "0000-0002-3860-1149"

Bulović, Vladimir ^[3]; Buonassisi, Tonio ^[2]; Shin, Seong Sik ^[5]; Bawendi, Moungi G.  ^[1]

• Search DOE PAGES for author "Bawendi, Moungi G."
• Search DOE PAGES for ORCID "0000-0003-2220-4365"

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+ Show Author Affiliations

1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, USA
2. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, USA
3. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, USA
4. Center for Nanoscale Systems, Harvard University, Cambridge, USA
5. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, USA, Division of Advanced Materials

Publication Date:

Wed Jul 10 00:00:00 EDT 2019

Research Org.:

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:

1530475

Alternate Identifier(s):

OSTI ID: 1609911

Grant/Contract Number:  

FG02-07ER46454; CBET-1605495

Resource Type:

Published Article

Journal Name:

Energy & Environmental Science

Additional Journal Information:

Journal Name: Energy & Environmental Science Journal Volume: 12 Journal Issue: 7; Journal ID: ISSN 1754-5692

Publisher:

Royal Society of Chemistry

Country of Publication:

United Kingdom

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 14 SOLAR ENERGY; Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology