当前位置: X-MOL 学术Nat. Commun. › 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.)
Defect passivation in methylammonium/bromine free inverted perovskite solar cells using charge-modulated molecular bonding
Nature Communications ( IF 14.7 ) Pub Date : 2024-01-29 , DOI: 10.1038/s41467-024-45228-9
Dhruba B Khadka 1 , Yasuhiro Shirai 1 , Masatoshi Yanagida 1 , Hitoshi Ota 2 , Andrey Lyalin 3, 4 , Tetsuya Taketsugu 4, 5 , Kenjiro Miyano 1
Affiliation  

Molecular passivation is a prominent approach for improving the performance and operation stability of halide perovskite solar cells (HPSCs). Herein, we reveal discernible effects of diammonium molecules with either an aryl or alkyl core onto Methylammonium-free perovskites. Piperazine dihydriodide (PZDI), characterized by an alkyl core-electron cloud-rich-NH terminal, proves effective in mitigating surface and bulk defects and modifying surface chemistry or interfacial energy band, ultimately leading to improved carrier extraction. Benefiting from superior PZDI passivation, the device achieves an impressive efficiency of 23.17% (area ~1 cm2) (low open circuit voltage deficit ~0.327 V) along with superior operational stability. We achieve a certified efficiency of ~21.47% (area ~1.024 cm2) for inverted HPSC. PZDI strengthens adhesion to the perovskite via -NH2I and Mulliken charge distribution. Device analysis corroborates that stronger bonding interaction attenuates the defect densities and suppresses ion migration. This work underscores the crucial role of bifunctional molecules with stronger surface adsorption in defect mitigation, setting the stage for the design of charge-regulated molecular passivation to enhance the performance and stability of HPSC.



中文翻译:


使用电荷调制分子键对无甲基铵/溴的倒置钙钛矿太阳能电池进行缺陷钝化



分子钝化是提高卤化物钙钛矿太阳能电池 (HPSC) 性能和运行稳定性的重要方法。在此,我们揭示了具有芳基或烷基核心的二铵分子对无甲基铵钙钛矿的明显影响。哌嗪二氢碘化物 (PZDI) 的特征是烷基核心-电子富含云的 NH 末端,被证明可有效减轻表面和本体缺陷并改变表面化学或界面能带,最终导致改进的载流子提取。得益于卓越的 PZDI 钝化,该器件实现了令人印象深刻的 23.17%(面积 ~1 cm2)(低开路电压赤字 ~0.327 V)以及卓越的运行稳定性。对于倒置 HPSC,我们实现了 ~21.47%(面积 ~1.024 cm2)的认证效率。PZDI 通过 -NH2I 和 Mulliken 电荷分布加强了对钙钛矿的粘附。器件分析证实,更强的键合相互作用会减弱缺陷密度并抑制离子迁移。这项工作强调了具有更强表面吸附的双功能分子在缺陷缓解中的关键作用,为设计电荷调节分子钝化以增强 HPSC 的性能和稳定性奠定了基础。

更新日期:2024-02-02
down
wechat
bug