Additive engineering with 2,8-dibromo-dibenzothiophene-S,S-dioxide enabled tin-based perovskite solar cells with 14.98% power conversion efficiency,Energy & Environmental Science

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Additive engineering with 2,8-dibromo-dibenzothiophene-S,S-dioxide enabled tin-based perovskite solar cells with 14.98% power conversion efficiency
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2024-03-13 , DOI: 10.1039/d3ee03359g
Xianyong Zhou _{1,

2,

3,

4,

5} , Wenbo Peng _{1,

3,

4,

5} , Zhixin Liu _{1,

3,

4,

5,

6} , Yong Zhang _{1,

3,

4,

5} , Luozheng Zhang ₇ , Meiqing Zhang ₈ , Chang Liu ₂ , Lei Yan ₉ , Xingzhu Wang _{1,

2,

3,

4,

5} , Baomin Xu _{1,

3,

4,

5}

Affiliation

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
School of Electrical Engineering, University of South China, Hengyang 421001, China
Shenzhen Engineering Research and Development Center for Flexible Solar Cells, Southern University of Science and Technology, Shenzhen 518055, China
Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong, Southern University of Science and Technology, Shenzhen 518055, China
Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China
SUSTech Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
College of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China
College of Mathematics and Physics, University of South China, Hengyang 421001, China
Shenzhen Putai Technology Co., Ltd, Longhua District, Shenzhen 518000, China

As the most promising lead-free perovskite, tin-based perovskite has attracted much attention due to its suitable bandgap and low toxicity. However, many defects (tin vacancy defects caused by Sn²⁺ oxidation to Sn⁴⁺, grain boundary defects and point defects) in tin-based perovskite lead to serious losses in device efficiency. Here, a universal and effective doping strategy is delivered to improve the structure and optoelectronic properties of tin-based perovskite films through 2,8-dibromo-dibenzothiophene-S,S-dioxide (BrDS) doping. The introduction of BrDS can effectively inhibit the oxidation of Sn²⁺ and passivate grain boundary defects and point defects in the perovskite films. The tin-based perovskite film doped with BrDS exhibits higher carrier lifetime and crystal quality. As a result, the BrDS-doped device achieves a power conversion efficiency of 14.98% with a certified efficiency of 14.36%, which is one of the highest PCEs among all values reported to date for tin-based PSCs. In addition, the BrDS-doped PSC devices exhibit significantly improved long-term stability and improved operational stability in a N₂ atmosphere. This work represents a noteworthy step towards manufacturing efficient and stable tin-based PSCs.

中文翻译：

采用 2,8-二溴二苯并噻吩-S,S-二氧化物的增材工程使锡基钙钛矿太阳能电池具有 14.98% 的功率转换效率

作为最有前途的无铅钙钛矿，锡基钙钛矿由于其合适的带隙和低毒性而备受关注。然而，锡基钙钛矿中的许多缺陷（由Sn ²⁺氧化成Sn ⁴⁺引起的锡空位缺陷、晶界缺陷和点缺陷）导致器件效率严重损失。在此，提出了一种通用且有效的掺杂策略，通过 2,8-二溴二苯并噻吩-S，S-二氧化物（BrDS）掺杂来改善锡基钙钛矿薄膜的结构和光电性能。 BrDS的引入可以有效抑制Sn ²⁺的氧化，钝化钙钛矿薄膜中的晶界缺陷和点缺陷。掺杂BrDS的锡基钙钛矿薄膜表现出更高的载流子寿命和晶体质量。结果，掺杂 BrDS 的器件实现了 14.98% 的功率转换效率，认证效率为 14.36%，这是迄今为止报道的锡基 PSC 的所有值中最高的 PCE 之一。此外，BrDS掺杂的PSC器件表现出显着改善的长期稳定性以及在N ₂气氛中改善的操作稳定性。这项工作代表着朝着制造高效、稳定的锡基 PSC 迈出了值得注意的一步。

更新日期：2024-03-13

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