当前位置：
X-MOL 学术
›
J. Phys. Chem. Lett.
›
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.)
Potassium Salt Coordination Induced Ion Migration Inhibition and Defect Passivation for High-Efficiency Perovskite Solar Cells
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-09-08 , DOI: 10.1021/acs.jpclett.2c02414 Hanyu Wang 1 , Wenjing Zou 1 , Yukun Ouyang 1 , Xingchong Liu 1 , Haimin Li 1 , Hu Luo 1 , Xiaopeng Zhao 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-09-08 , DOI: 10.1021/acs.jpclett.2c02414 Hanyu Wang 1 , Wenjing Zou 1 , Yukun Ouyang 1 , Xingchong Liu 1 , Haimin Li 1 , Hu Luo 1 , Xiaopeng Zhao 1
Affiliation
|
The disordered distribution of trap states and ion migration limit the commercial application of perovskite solar cells (PSCs). Herein, we apply an oxamic acid potassium salt (OAPS) as a bifunctional additive of perovskite film. The Lewis base group C=O of OAPS can interact with the uncoordinated Pb2+ caused by the I site substitution by Pb and the dangling bonds of the perovskite, which is beneficial to reduce the nonradiative recombination loss. In addition, the countercation K+ of OAPS is confirmed to occupy the perovskite lattice interstitial sites and result in lattice expansion, inhibiting the formation of iodide Frenkel defects and I– ion migration. As a result, the synergistic effect achieves enhanced power conversion efficiency (PCE) from 19.98 to 23.02%, with a fill factor reaching up to 81.90% and suppressed current–voltage hysteresis. The device also presents improved stability, maintaining 93% of the initial PCE after 2000 h of storage.
中文翻译：
钾盐配位诱导离子迁移抑制和缺陷钝化用于高效钙钛矿太阳能电池
陷阱态的无序分布和离子迁移限制了钙钛矿太阳能电池（PSC）的商业应用。在此，我们应用草酸钾盐（OAPS）作为钙钛矿薄膜的双功能添加剂。OAPS的Lewis碱基C=O可以与Pb取代I位引起的不配位Pb 2+和钙钛矿的悬空键相互作用，有利于降低非辐射复合损失。此外，OAPS 的反阳离子 K +被证实占据钙钛矿晶格间隙位并导致晶格膨胀，抑制碘化物 Frenkel 缺陷和 I -离子迁移。结果，协同效应实现了从 19.98% 提高到 23.02% 的功率转换效率 (PCE)，填充因子高达 81.90%，并抑制了电流-电压滞后。该设备还表现出更高的稳定性，在 2000 小时存储后保持初始 PCE 的 93%。
更新日期：2022-09-08
中文翻译：
钾盐配位诱导离子迁移抑制和缺陷钝化用于高效钙钛矿太阳能电池
陷阱态的无序分布和离子迁移限制了钙钛矿太阳能电池（PSC）的商业应用。在此，我们应用草酸钾盐（OAPS）作为钙钛矿薄膜的双功能添加剂。OAPS的Lewis碱基C=O可以与Pb取代I位引起的不配位Pb 2+和钙钛矿的悬空键相互作用，有利于降低非辐射复合损失。此外，OAPS 的反阳离子 K +被证实占据钙钛矿晶格间隙位并导致晶格膨胀，抑制碘化物 Frenkel 缺陷和 I -离子迁移。结果，协同效应实现了从 19.98% 提高到 23.02% 的功率转换效率 (PCE)，填充因子高达 81.90%，并抑制了电流-电压滞后。该设备还表现出更高的稳定性，在 2000 小时存储后保持初始 PCE 的 93%。
京公网安备 11010802027423号