Surface passivation of active layer by introducing sodium alginate for high-performance perovskite photodetectors

Genjie Yang; Dayong Zhang; Jiawen Li; Junsheng Yu

doi:10.1117/12.2603956

13 December 2021 Surface passivation of active layer by introducing sodium alginate for high-performance perovskite photodetectors

Genjie Yang, Dayong Zhang, Jiawen Li, Junsheng Yu

Author Affiliations +

Proceedings Volume 12074, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Novel Optoelectronic Functional Materials and Devices; 120740J (2021) https://doi.org/10.1117/12.2603956
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

Recently, organic metal halide perovskites have attracted wide attention in the field of photovoltaic devices due to series of excellent photoelectric properties. However, the device performance is limited by a large number of surface defects in the perovskite film. Finding an effective method for defect passivation of perovskite film is considered to be a preferred strategy to further improve the performance of perovskite photovoltaic devices. Here, we use an organic metal salt, sodium alginate (SA), to passivate the surface defects of perovskite films to prepare high-performance perovskite photodetectors (PePDs). We find that the introduction of SA can improve the quality of perovskite active layer and passivate the surface defects effectively, which reduce the carrier recombination probability to increase the photocurrent and reduce the dark current of the PePDs. And the detectivity (D*) at 600 nm reaches 3.6×10¹² Jones, three times that of the controlled devices. Meanwhile, the PePDs doped with sodium alginate have better stability and device life, which remains 82% of the original performance after being placed in the atmosphere for 7 days. These results indicate that it is an effective strategy to passivate perovskite film with organic metal salt to prepare high-performance PePDs.

Citation Download Citation

Genjie Yang, Dayong Zhang, Jiawen Li, and Junsheng Yu "Surface passivation of active layer by introducing sodium alginate for high-performance perovskite photodetectors", Proc. SPIE 12074, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Novel Optoelectronic Functional Materials and Devices, 120740J (13 December 2021); https://doi.org/10.1117/12.2603956

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

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Perovskite

Photodetectors

Absorption

External quantum efficiency

Coating

Scanning electron microscopy

Doping

Keywords/Phrases

Search In:

Publication Years