Chlorine-assisted recovery of performance loss in MAPbI3 solar cells caused by low purity of PbI2

Minlin Jiang; Zuo Wang; Yi Zhou; Nanrun Zhou; Lihua Gong

doi:10.1117/1.JPE.9.015502

21 March 2019 Chlorine-assisted recovery of performance loss in MAPbI₃ solar cells caused by low purity of PbI₂

Minlin Jiang, Zuo Wang, Yi Zhou, Nanrun Zhou, Lihua Gong

Author Affiliations +

Journal of Photonics for Energy, Vol. 9, Issue 1, 015502 (March 2019). https://doi.org/10.1117/1.JPE.9.015502

Abstract

We report an exciting discovery that the performance loss in MAPbI₃ solar cells due to low purity of PbI₂ can be fully recovered by adding a small amount of Cl source (MACl). The averaged efficiency of MAPbI₃ solar cells using low-purity PbI₂ is 14.16%, whereas that using high-purity PbI₂ is 16.39%. Excitingly, the averaged efficiency of MAPbI₃ solar cells using low-purity PbI₂ is boosted to 16.58% by adding a small amount of MACl into MAPbI₃ precursor, which is comparable to that from high-purity PbI₂. Results from scanning electron microscopy and x-ray diffraction indicate that the morphologies and structures of MAPbI₃ thin films are not affected by the purity of PbI₂ and the addition of small amount of Cl source. Further investigations using open-circuit voltage decay and admittance spectroscopy (AS) reveal that low purity of PbI₂ leads to lower electron lifetime due to higher defect density, whereas the addition of Cl can suppress the defect density, resulting into higher electron lifetime. This discovery may offer a great opportunity for fabricating low-cost, high-efficiency perovskite solar cells using low-purity feedstocks, which would definitely expedite the development of environment-friendly perovskite solar cells.

Citation Download Citation

Minlin Jiang, Zuo Wang, Yi Zhou, Nanrun Zhou, and Lihua Gong "Chlorine-assisted recovery of performance loss in MAPbI₃ solar cells caused by low purity of PbI₂," Journal of Photonics for Energy 9(1), 015502 (21 March 2019). https://doi.org/10.1117/1.JPE.9.015502

Received: 12 November 2018; Accepted: 27 February 2019; Published: 21 March 2019

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE