The current top challenge for the commercialization of perovskite solar cells is to ensure long-term stability. Herein, we developed pulsatile therapy, which can revive the degraded device and eventually prolong device lifetime by addressing the accumulation of both charges and ions in the middle of maximum power point tracking (MPPT). In this technique, reverse biases are repeatedly applied for a short time to eliminate the charges accumulated and redistribute the ions that have migrated during power harvesting without any pause of operation. Intriguingly, the therapy is not only delaying irreversible degradation but also restoring the degraded power right after a short reverse bias. In situ measurements of photoluminescence intensity and photocurrent dynamics during the therapy confirmed that newly formed defects could be annihilated as a result of discharging and ion redistribution, featuring suppression of defect formation and irreversible degradation. In the long-term test, we observed outstanding improvement of device stability and total harvesting energy.

目前钙钛矿太阳能电池商业化的最大挑战是确保长期稳定性。在这里，我们开发了脉冲疗法，通过解决最大功率点跟踪 (MPPT) 中间电荷和离子的积累，可以恢复退化的设备并最终延长设备寿命。在该技术中，在短时间内重复施加反向偏压以消除累积的电荷并重新分配在电力收集期间迁移的离子，而不会暂停操作。有趣的是，这种疗法不仅可以延缓不可逆的退化，而且还可以在短暂的反向偏置后立即恢复退化的功率。原位在治疗过程中对光致发光强度和光电流动力学的测量证实，新形成的缺陷可以由于放电和离子再分布而被消灭，具有抑制缺陷形成和不可逆降解的特点。在长期测试中，我们观察到设备稳定性和总收集能量的显着提高。