Solar cells with varied absorbers, ranging from crystalline silicon to perovskite materials, are very vulnerable to water. Expensive and complicated encapsulation is needed to protect the devices. Thus, it is highly desirable to achieve encapsulation‐free solar cells with high water tolerance. Herein, encapsulation‐free selenium (Se)‐based solar cells (SSCs) with hydrophobic polymers as electron and hole transport layers are presented and can successfully tolerate the aqueous conditions. Moreover, it is found that the photocurrent–time curve under the aqueous/ambient environment can be smoothly fitted into the first‐order exponential models. The photocurrent of water‐soaking SSCs can recover to its original value after drying in the air, which proves the great water tolerance of fabricated SSCs. Furthermore, the SSCs also show good long‐term and thermal stability. The viability of encapsulation‐free SSCs under a harsh environment provides opportunities to further explore the interactions among light, water, and solar cells as well as make large‐scale industrialization applications of SSCs much easier.

中文翻译：

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基于硒的太阳能电池，具有共轭聚合物作为电子和空穴传输层，可实现高耐水性以及良好的长期和热稳定性

从晶体硅到钙钛矿材料，吸收剂种类繁多的太阳能电池极易受水腐蚀。需要昂贵且复杂的封装来保护设备。因此，非常需要获得具有高耐水性的无封装太阳能电池。本文介绍了具有疏水性聚合物作为电子和空穴传输层的无封装硒（Se）基太阳能电池（SSC），它们可以成功地耐受水性条件。此外，发现在水/环境下的光电流-时间曲线可以平滑地拟合到一阶指数模型中。在空气中干燥后，浸水的SSC的光电流可以恢复到其原始值，这证明了制成的SSC的耐水性强。此外，SSC还显示出良好的长期和热稳定性。无封装SSC在恶劣环境下的生存能力为进一步探索光，水和太阳能电池之间的相互作用提供了机会，并使SSC的大规模工业化应用变得更加容易。