Na effects on CuInSe2: Distinguishing bulk from surface phenomena
Na effects on CuInSe2: Distinguishing bulk from surface phenomena
复制标题
DOI：
10.1063/1.1457539
复制
发表时间：
2002-03
影响因子：
3.2
通讯作者：
V. Lyahovitskaya;Y. Feldman;K. Gartsman;H. Cohen;C. Cytermann;D. Cahen
中科院分区：
文献类型：
--
作者：
V. Lyahovitskaya;Y. Feldman;K. Gartsman;H. Cohen;C. Cytermann;D. Cahen
钠对 CuInSe2 基太阳能电池性能的影响已经讨论了十年。我们使用二次离子质谱、X射线光电子能谱（XPS）和其他补充物理表征方法提供了实验证据，这些方法表明，在暴露于外部钠源后，除了通过晶界等缺陷外，在生长样品中发现的残留量之外，没有大量的钠进入完整的晶体。然而，在这种暴露之后，根据 XPS 判断，晶体表面上的钠浓度很高，同时氧浓度也随之增加。正如预期的那样，金属钠会攻击晶体并破坏它们或至少引入显着的缺陷密度。发现添加 Se0，通过 Na2Se 的形成，可以缓和 Na 的活性，特别是其对晶体崩解的影响。这与 Se0 的影响不同，其中（n 型）晶体退火导致......
The effect of sodium on the performance of CuInSe2-based solar cells has been under discussion for already a decade. We present experimental evidence using secondary ion mass spectroscopy, x-ray photoelectron spectroscopy (XPS) and other, complementary physical characterization methods, which indicate that, after exposure to an external Na source, no significant amounts of sodium, beyond the residual amount, found in as-grown samples, enter intact crystals, except via defects such as grain boundaries. However, after such exposure, sodium is found in significant concentrations on crystal surfaces, something that is accompanied by an increase in oxygen concentration, as judged by XPS. As expected metallic Na attacks the crystals and can destroy them or at least introduce significant defect densities. Adding Se0 is found, via Na2Se formation, to temper Na activity specifically its effects on crystal disintegration. This is different from the effect of Se0 along where annealing (of n-type) crystals results in...