多功能策略：柠檬酸铵改性 SnO2 ETL 用于高效稳定的钙钛矿太阳能电池,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

多功能策略：柠檬酸铵改性 SnO2 ETL 用于高效稳定的钙钛矿太阳能电池
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-09-14 , DOI: 10.1021/acsami.2c13309
Wenqi Zeng _{1,

2} , Xiaofeng He _{1,

2} , Hongyu Bian _{1,

2} , Pengju Guo ₁ , Meng Wang ₃ , Cunyun Xu ₁ , Gaobo Xu ₁ , Yuanxin Zhong ₁ , Dengcheng Lu ₁ , Zdeněk Sofer _{4,

5} , Qunliang Song _{1,

5} , Sam Zhang _{1,

2}

Affiliation

氧化锡（SnO ₂）电子传输层（ETL）在钙钛矿太阳能电池（PSC）中起着至关重要的作用。然而，商业 SnO ₂胶体前驱体的非均相分散远未得到优化，导致 SnO ₂ ETL 的器件性能不令人满意。在此，使用多功能改性材料柠檬酸铵（TAC）对SnO ₂ ETL进行改性，带来四个好处：（1）由于TAC分子与SnO ₂胶体颗粒之间的静电相互作用，获得了更均匀分散的胶体颗粒; (2) 分布在SnO _{2表面的TAC分子}为钙钛矿薄膜的生长提供成核位点，促进钙钛矿晶体的垂直生长；(3) TAC 掺杂的 SnO _{2比原始 SnO}₂具有更高的电子传导性和更好的薄膜质量，同时提供与钙钛矿层更好的能级对准；(4) TAC具有C=O和N-H官能团，含有孤对电子，可通过化学键合钝化SnO ₂和钙钛矿薄膜表面的缺陷，抑制器件迟滞。最终，基于 TAC 掺杂 ETL 的器件实现了 21.58 的功率转换效率 (PCE)，从没有经过此类处理的参考值的 19.75% 提高。同时，使用 TAC 掺杂的 SnO _{2的 PSC}因为 ETL 在黑暗条件下储存约 1000 小时后保持其初始 PCE 的 88%，并将 RH 控制在 10-25%。

"点击查看英文标题和摘要"

Multi-functional Strategy: Ammonium Citrate-Modified SnO2 ETL for Efficient and Stable Perovskite Solar Cells

The tin oxide (SnO₂) electron transport layer (ETL) plays a crucial role in perovskite solar cells (PSCs). However, the heterogeneous dispersion of commercial SnO₂ colloidal precursors is far from optimized, resulting in dissatisfied device performance with SnO₂ ETL. Herein, a multifunctional modification material, ammonium citrate (TAC), is used to modify the SnO₂ ETL, bringing four benefits: (1) due to the electrostatic interaction between TAC molecules and SnO₂ colloidal particles, more uniformly dispersed colloidal particles are obtained; (2) the TAC molecules distributed on the surface of SnO₂ provide nucleation sites for the perovskite film growth, promoting the vertical growth of the perovskite crystal; (3) TAC-doped SnO₂ shows higher electron conductivity and better film quality than pristine SnO₂ while offering better energy-level alignment with the perovskite layer; and (4) TAC has functional groups of C═O and N–H containing lone pair electrons, which can passivate the defects on the surface of SnO₂ and perovskite films through chemical bonding and inhibit the device hysteresis. In the end, the device based on TAC-doped ETL achieved an increased power conversion efficiency (PCE) of 21.58 from 19.75% of the reference without such treatment. Meanwhile, the PSCs using the TAC-doped SnO₂ as the ETL maintained 88% of their initial PCE after being stored for about 1000 h under dark conditions and controlled RH of 10–25%.

更新日期：2022-09-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>