Title: Regulating surface potential maximizes voltage in all-perovskite tandems

Abstract

The open circuit voltage (V_OC) deficit in perovskite solar cells (PSCs) is greater in wide bandgap (>1.7 eV) cells than in ~1.5 eV perovskites. Quasi-Fermi level splitting (QFLS) measurements reveal V_OC-limiting recombination at the electron transport layer (ETL) contact. This, we find, stems from inhomogeneous surface potential and poor perovskite-ETL energetic alignment. Common monoammonium surface treatments fail to address this; instead we introduce diammonium molecules to modify the perovskite surface states and achieve a more uniform spatial distribution of surface potential. Using 1,3-propane diammonium (PDA), QFLS increases by 90 meV, enabling 1.79 eV PSCs with a certified 1.33 V V_OC, and > 19% power conversion efficiency (PCE). Incorporating this layer into a monolithic all-perovskite tandem, we report a record V_OC of 2.19 V (89% of the Detailed Balance V_OC limit) and > 27% PCE (26.3% certified quasi-steady-state). Furthermore, these tandems retain more than 86% of their initial PCE after 500 hrs operation.

Authors:

Chen, Hao  ^[1];

• Search DOE PAGES for author "Chen, Hao"
• Search DOE PAGES for ORCID "0000-0002-6995-0288"

Maxwell, Aidan ^[2]; Li, Chongwen ^[3]; Teale, Sam  ^[2];

• Search DOE PAGES for author "Teale, Sam"
• Search DOE PAGES for ORCID "0000-0001-9638-3453"

Chen, Bin  ^[4];

• Search DOE PAGES for author "Chen, Bin"
• Search DOE PAGES for ORCID "0000-0002-2106-7664"

Zhu, Tong ^[2]; Ugur, Esma  ^[5];

• Search DOE PAGES for author "Ugur, Esma"
• Search DOE PAGES for ORCID "0000-0003-0070-334X"

Harrison, George ^[5]; Grater, Luke ^[2]; Wang, Junke  ^[2];

• Search DOE PAGES for author "Wang, Junke"
• Search DOE PAGES for ORCID "0000-0002-5849-7297"

Wang, Zaiwei  ^[1];

• Search DOE PAGES for author "Wang, Zaiwei"
• Search DOE PAGES for ORCID "0000-0001-9725-0206"

Zeng, Lewei ^[1]; Park, So Min  ^[1];

• Search DOE PAGES for author "Park, So Min"
• Search DOE PAGES for ORCID "0000-0001-7677-5564"

Chen, Lei ^[6]; Serles, Peter ^[1]; Awni, Rasha Abbas  ^[6];

• Search DOE PAGES for author "Awni, Rasha Abbas"
• Search DOE PAGES for ORCID "0000-0002-5971-0934"

Subedi, Biwas ^[6]; Zheng, Xiaopeng  ^[7];

• Search DOE PAGES for author "Zheng, Xiaopeng"
• Search DOE PAGES for ORCID "0000-0001-5061-3655"

Xiao, Chuanxiao ^[7]; Podraza, Nikolas J. ^[6] more »; Filleter, Tobin  ^[5];

• Search DOE PAGES for author "Filleter, Tobin"
• Search DOE PAGES for ORCID "0000-0003-2609-4773"

Liu, Cheng ^[8]; Yang, Yi ^[8]; Luther, Joseph M.  ^[7];

• Search DOE PAGES for author "Luther, Joseph M."
• Search DOE PAGES for ORCID "0000-0002-4054-8244"

De Wolf, Stefaan  ^[5];

• Search DOE PAGES for author "De Wolf, Stefaan"
• Search DOE PAGES for ORCID "0000-0003-1619-9061"

Kanatzidis, Mercouri G.  ^[8];

• Search DOE PAGES for author "Kanatzidis, Mercouri G."
• Search DOE PAGES for ORCID "0000-0003-2037-4168"

Yan, Yanfa  ^[6];

• Search DOE PAGES for author "Yan, Yanfa"
• Search DOE PAGES for ORCID "0000-0003-3977-5789"

Sargent, Edward H.  ^[9]

• Search DOE PAGES for author "Sargent, Edward H."
• Search DOE PAGES for ORCID "0000-0003-0396-6495"

« less

---

+ Show Author Affiliations

1. University of Toronto, ON (Canada)
2. Univ. of Toronto, ON (Canada)
3. Univ. of Toronto, ON (Canada); Univ. of Toledo, OH (United States)
4. Univ. of Toronto, ON (Canada); Northwestern Univ., Evanston, IL (United States)
5. King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia)
6. University of Toledo, OH (United States)
7. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
8. Northwestern University, Evanston, IL (United States)
9. University of Toronto, ON (Canada); Northwestern University, Evanston, IL (United States)

Publication Date:

Tue Nov 15 00:00:00 EST 2022

Research Org.:

National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Org.:

USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

OSTI Identifier:

1900407

Alternate Identifier(s):

OSTI ID: 1903181

Report Number(s):

NREL/JA-5900-83296
Journal ID: ISSN 0028-0836

Grant/Contract Number:  

EE0008753; AC36-08GO28308

Resource Type:

Accepted Manuscript

Journal Name:

Nature (London)

Additional Journal Information:

Journal Name: Nature (London); Journal Volume: 613; Journal Issue: 7945; Journal ID: ISSN 0028-0836

Publisher:

Nature Publishing Group

Country of Publication:

United States

Language:

English

Subject:

14 SOLAR ENERGY; all perovskite tandem; electronic properties; perovskite solar cell; photonic devices