-
铅卤钙钛矿可实现溶液法制备且具有诸多优异的光电特性, 在高效太阳能电池、发光二极管、激光、光探测器等光电子领域具有广阔的应用前景. 但是铅卤钙钛矿在光辐照下存在不稳定问题, 严重影响其相关光电器件的寿命和性能稳定性. 因此, 铅卤钙钛矿在持续光照下的不稳定性现象及其机理正受到越来越多的关注. 本文综述了铅卤钙钛矿在持续光照下的四类主要不稳定现象, 即光修复现象、光解现象、光致相分离现象以及光致相变现象, 并介绍目前已提出的相关机理, 分别从缺陷态、离子迁移、热力学原理、化学键等角度来解释其光照不稳定性. 最后, 本文简要讨论了钙钛矿中光稳定性研究的复杂性及未来需要解决的问题.Lead halide perovskites, which can be grown by solution process, are very suitable for various optoelectronic applications, such as in solar cells, light-emitting diodes, lasers and photo-detectors, due to their outstanding electrical and optical properties. However, lead halide perovskites are unstable under continuous light illumination, which severely degrades the performance and lifetime of optoelectronic devices based on them. Therefore, the photo-stability of perovskites and the mechanisms have received more and more attention. In this article we review the main phenomena in perovskites, induced by continuous light illumination, namely photo curing, photo dissociation, photo-induced phase separation, and photo-induced phase transition. The proposed mechanisms for the instability from the perspectives of defect states, ion migration, thermodynamics and chemical bonds, respectively, are also introduced. Finally, the complexity presented in the studying of photo-stability, and the issues should be addressed in the future are also briefly discussed.
-
Keywords:
- lead halide perovskite/
- photo-stability/
- mechanisms
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84] [85] [86] [87] [88] [89] [90] [91] [92] [93] [94] [95] [96] [97] [98] [99] [100] [101] [102] [103] -
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84] [85] [86] [87] [88] [89] [90] [91] [92] [93] [94] [95] [96] [97] [98] [99] [100] [101] [102] [103]
下载:
计量
- 文章访问数:16853
- PDF下载量:585
- 被引次数:0