Mitigating Open-Circuit Voltage Loss in Pb-Sn Low-Bandgap Perovskite Solar Cells via Additive Engineering

被引：52

作者：

Ghimire, Nabin ^{[1
]}

Bobba, Raja Sekhar ^{[1
]}

Gurung, Ashim ^{[1
]}

Reza, Khan Mamun ^{[1
]}

Laskar, Md Ashiqur Rahman ^{[1
]}

Lamsal, Buddhi Sagar ^{[1
]}

Emshadi, Khalid ^{[1
]}

Pathak, Rajesh ^{[1
]}

Afroz, Mohammad Adil ^{[2
]}

Chowdhury, Ashraful Haider ^{[1
]}

Chen, Ke ^{[1
]}

Bahrami, Behzad ^{[1
]}

Rahman, Sheikh Ifatur ^{[1
]}

Pokharel, Jyotshna ^{[1
]}

Baniya, Abiral ^{[1
]}

Rahman, Md Tawabur ^{[1
]}

Zhou, Yue ^{[1
]}

Qiao, Quinn ^{[3
]}

机构：

[1] South Dakota State Univ, Ctr Adv Photovolta, Dept Elect Engn, Brookings, SD 57007 USA

[2] Indian Inst Technol Guwahati, Dept Chem, Gauhati 781039, Assam, India

[3] Syracuse Univ, Dept Mech & Aerosp Engn, Syracuse, NY 13244 USA

来源：

ACS APPLIED ENERGY MATERIALS | 2021年 / 4卷 / 02期

关键词：

low-bandgap perovskite; PEAI salt; defect passivation; Pb-Sn hybrid perovskite; additive engineering; V-oc deficit; HALIDE PEROVSKITES; MIXED SN; EFFICIENT; HETEROJUNCTION; STABILITY; IODIDE; PERFORMANCE; TRANSPORT; DESIGN; LAYER;

D O I：

10.1021/acsaem.0c02895

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lead (Pb)-Tin (Sn) mixed perovskites suffer from large open-circuit voltage (V-oc) loss due to the rapid crystallization of perovskite films, creating Sn and Pb vacancies. Such vacancies act as defect sites expediting charge carrier recombination, thus hampering the charge carrier dynamics and optoelectronic properties of the perovskite film. Here, we report the passivation of these defects using a controlled amount of 2- phenyl-ethylazanium iodide (PEAI) in perovskite precursor solution as a dopant to enhance the performance of the 1.25 eV Pb-Sn low-bandgap perovskite solar cell. It was found that the incorporation of PEAI in the perovskite precursor not only improves the perovskite film quality and crystallinity but also lowers the electronic disorder, thereby enhancing the open-circuit voltage up to 0.85 V, corresponding to V-oc loss as low as 0.4 V and the power conversion efficiency up to 17.33%. The value of V-oc loss obtained with this strategy is among the least obtained for similar band gap Pb-Sn low-bandgap perovskite solar cells. Furthermore, the ambient and dark self-stability of the PEAI-treated devices were also enhanced. This work presents a simple doping strategy to mitigate the V-oc loss of Pb-Sn mixed low-bandgap perovskite solar cells.

引用

页码：1731 / 1742

页数：12

共 68 条

[1] Thermal Stability and Performance Enhancement of Perovskite Solar Cells Through Oxalic Acid-Induced Perovskite Formation [J].