Perovskite seeding growth of formamidinium-lead-iodide-based perovskites for efficient and stable solar cells.
Perovskite seeding growth of formamidinium-lead-iodide-based perovskites for efficient and stable solar cells.
复制标题
DOI：
10.1038/s41467-018-04029-7
复制
发表时间：
2018-04-23
影响因子：
16.6
通讯作者：
Sargent EH
中科院分区：
文献类型：
--
作者：
Zhao Y;Tan H;Yuan H;Yang Z;Fan JZ;Kim J;Voznyy O;Gong X;Quan LN;Tan CS;Hofkens J;Yu D;Zhao Q;Sargent EH
禁带宽度在1.55 eV以下的FAPbI_3基钙钛矿由于其接近理想的禁带宽度，在光伏领域具有广阔的应用前景。基于记录性能的FAPbI3太阳能电池依赖于顺序沉积方法的制造；然而，由于难以在顺序沉积的薄膜中掺入铯离子(稳定剂)，这些器件在光照下表现出不稳定的输出。在这里，我们设计了一种钙钛矿晶种方法，它有效地结合了铯，并有益地调节了钙钛矿的结晶。首先，在PbI2薄膜中嵌入钙钛矿晶种。在钙钛矿形成过程中，钙钛矿晶种作为铯的来源，并作为晶核促进结晶。采用钙钛矿晶种生长的钙钛矿型薄膜具有较低的陷阱密度，在1.13 V的高开路电压和80%以上的填充因子下，所得到的平面太阳电池的稳定效率为21.5%。含Cs的FAPbI3基器件的工作稳定性有了显著的提高，在一次日照下运行140 h后，其效率仍保持在原来的60%。甲酰胺-碘化铅钙钛矿在太阳能电池应用中具有低于1.55 eV的首选带隙，但存在操作不稳定的问题。在这里，赵等人。采用含铯籽晶生长提高了薄膜的质量，在模拟太阳光下表现出高的稳定效率和大于100 的h寿命。
Formamidinium-lead-iodide (FAPbI3)-based perovskites with bandgap below 1.55 eV are of interest for photovoltaics in view of their close-to-ideal bandgap. Record-performance FAPbI3-based solar cells have relied on fabrication via the sequential-deposition method; however, these devices exhibit unstable output under illumination due to the difficulty of incorporating cesium cations (stabilizer) in sequentially deposited films. Here we devise a perovskite seeding method that efficiently incorporates cesium and beneficially modulates perovskite crystallization. First, perovskite seed crystals are embedded in the PbI2 film. The perovskite seeds serve as cesium sources and act as nuclei to facilitate crystallization during the formation of perovskite. Perovskite films with perovskite seeding growth exhibit a lowered trap density, and the resulting planar solar cells achieve stabilized efficiency of 21.5% with a high open-circuit voltage of 1.13 V and a fill factor that exceeds 80%. The Cs-containing FAPbI3-based devices show a striking improvement in operational stability and retain 60% of their initial efficiency after 140 h operation under one sun illumination. Formamidinium-lead-iodide-based perovskites have a preferred bandgap below 1.55 eV for solar cell applications but suffer from operational instability. Here, Zhao et al. improve the film quality using cesium-containing seeded growth to show high stabilized efficiency and more than 100 h lifetime under simulated sunlight.
登录
查看更多内容
有机无机卤化物钙钛矿晶体快速生长的机制。
影响因子：
16.6
作者：
Nayak, Pabitra K.;Moore, David T.;Wenger, Bernard;Nayak, Simantini;Haghighirad, Amir A.;Fineberg, Adam;Noel, Nakita K.;Reid, Obadiah G.;Rumbles, Garry;Kukura, Philipp;Vincent, Kylie A.;Snaith, Henry J.
通讯作者：
Snaith, Henry J.
影响因子：
5.7
作者：
Beal, Rachel E.;Slotcavage, Daniel J.;McGehee, Michael D.
通讯作者：
McGehee, Michael D.
影响因子：
11.9
作者：
Eperon, Giles E.;Paterno, Giuseppe M.;Snaith, Henry J.
通讯作者：
Snaith, Henry J.
影响因子：
16.6
作者：
Leijtens, Tomas;Eperon, Giles E.;Snaith, Henry J.
通讯作者：
Snaith, Henry J.
影响因子：
56.9
作者：
McMeekin, David P.;Sadoughi, Golnaz;Snaith, Henry J.
通讯作者：
Snaith, Henry J.