通过强化学配位抑制金属向内扩散诱导的降解，实现稳定高效的倒置钙钛矿太阳能电池,Energy & Environmental Science

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通过强化学配位抑制金属向内扩散诱导的降解，实现稳定高效的倒置钙钛矿太阳能电池
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2022-04-16 , DOI: 10.1039/d1ee04022g
Jiabao Yang ₁ , Qi Cao ₁ , Tong Wang ₁ , Bowen Yang _{2,

3} , Xingyu Pu ₁ , Yixin Zhang ₁ , Hui Chen ₁ , Ilhom Tojiboyev ₄ , Yuke Li ₅ , Lioz Etgar ₆ , Xuanhua Li ₁ , Anders Hagfeldt _{2,

3}

Affiliation

金属电极的向内扩散是导致钙钛矿太阳能电池（PSC）长期器件稳定性恶化的主要原因之一。因此，在此，我们采用简单的添加剂工程策略，用 1,3,5-triazine-2,4,6-trithiol trisodium salt (TTTS) 修饰阻隔材料浴铜素 (BCP)。与传统的物理阻断策略不同，TTTS 可以阻止金属电极（例如、金、银和铜）通过 TTTS 和金属电极之间的强化学配位向内扩散。TTTS添加剂还改善了BCP的电导率和能带结构，从而增强了BCP将电子从钙钛矿层提取到电极的能力。因此，用 TTTS 修改的倒置器件表现出 22.59% 的高效率，这是迄今为止报道的倒置 PSC 的最高效率之一。更重要的是，它表现出出色的操作、环境和热稳定性。目标器件在最大功率点跟踪 1000 小时后保持其初始效率且没有损失，在空气中（50% ± 5% RH）5000 小时后为 91%，在最大功率点跟踪下保持 93%。在 85 °C 下加热 1500 小时（十个设备的平均效率）。

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Inhibiting metal-inward diffusion-induced degradation through strong chemical coordination toward stable and efficient inverted perovskite solar cells

The inward diffusion of metal electrodes is one of the main reasons for the deterioration of the long-term device stability of perovskite solar cells (PSCs). Thus, herein, we adopt a simple additive engineering strategy to modify the barrier material bathocuproine (BCP) with 1,3,5-triazine-2,4,6-trithiol trisodium salt (TTTS). Different from the traditional physical blocking strategies, TTTS could prevent the metal electrodes (e.g., gold, silver, and copper) from diffusing inward through the strong chemical coordination between TTTS and the metal electrode. The TTTS additive also improved the conductivity and band structure of BCP, thus enhancing the ability of BCP to extract electrons from the perovskite layer to the electrode. Consequently, the inverted device modified with TTTS exhibited a high efficiency of 22.59%, which is among the highest efficiencies reported to date for inverted PSCs. More importantly, it showed excellent operational, ambient, and thermal stability. The target device maintained its initial efficiency with no loss under continuous one-sun illumination at maximum power point tracking after 1000 h (the champion device), 91% in air (50% ± 5% RH) for 5000 h, and 93% after heating at 85 °C for 1500 h (average efficiency from ten devices).

更新日期：2022-04-16

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