High crystallization of a multiple cation perovskite absorber for low-temperature stable ZnO solar cells with high-efficiency of over 20%†,Nanoscale

当前位置： X-MOL 学术 › Nanoscale › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

High crystallization of a multiple cation perovskite absorber for low-temperature stable ZnO solar cells with high-efficiency of over 20%†
Nanoscale ( IF 5.8 ) Pub Date : 2018-03-22 00:00:00 , DOI: 10.1039/c8nr00152a
Xuemei Dong _{1,

2,

3,

4,

5} , Dong Chen _{1,

2,

3,

4} , Junshuai Zhou _{1,

2,

3,

4} , Yan-Zhen Zheng _{2,

3,

4,

5} , Xia Tao _{1,

2,

3,

4,

5}

Affiliation

ZnO as a promising electron transport layer (ETL) to TiO₂ for perovskite solar cells (PSCs) has achieved a power conversion efficiency (PCE) of 18.9%; however, this is still lower than that obtained for TiO₂-based PSCs (higher than 20%). Herein, we report the fabrication of high-efficiency methylammonium (MA) and Cs co-alloyed formamidinium (FA) triple cation perovskite based ZnO PSCs via delicate control of the cation compositions and annealing temperatures. By virtue of structural, morphological, spectral and electrochemical characterizations and analysis, we found that the incorporation of MA and Cs into FA perovskite enables the formation of a highly crystalline black phase perovskite with reduced surface roughness, which inhibits charge recombination and promotes electron transfer at the ZnO/perovskite/spiro-OMeTAD interfaces and hence improves J_sc and FF values of the cell. As a result, the ZnO PSC based on MA_0.1FA_0.75Cs_0.15PbI₃ annealed at 110 °C achieved a PCE as high as 20.09%, exceeding the previous highest efficiency recorded for ZnO ETL based PSCs. The optimized MA_0.1FA_0.75Cs_0.15PbI₃ material demonstrated excellent reproducibility and long-term cell durability under ambient conditions within 1000 h. Particularly, the incorporation of a small amount of Br into the triple cation perovskite, i.e., MA_0.1FA_0.75Cs_0.15PbI_2.9Br_0.1 led to a further enhancement in PCE of up to 20.44%, which is comparable with the best-performing MA and Cs-containing FA-based lead halide TiO₂ PSCs.

中文翻译：

用于低温稳定的ZnO太阳能电池的多阳离子钙钛矿吸收剂的高结晶度，效率超过20％†

ZnO作为钙钛矿型太阳能电池（PSC）的有前途的电子传输层（ETL）到TiO _2的电子传输层（PCE）的功率转换效率（PCE）为18.9％。然而，这仍然低于基于TiO ₂的PSC所获得的（高于20％）。在这里，我们报告高效甲铵（MA）和Cs共同合金甲脒（FA）三联阳离子钙钛矿型ZnO基物业服务公司的制造通过阳离子组成和退火温度的精细控制。通过结构，形态，光谱和电化学表征和分析，我们发现将MA和Cs掺入FA钙钛矿中可以形成具有降低的表面粗糙度的高结晶黑相钙钛矿，从而抑制了电荷重组并促进了电子的转移。 ZnO /钙钛矿/螺-OMeTAD界面，因此提高了细胞的J _sc和FF值。结果，在110°C下退火的基于MA _0.1 FA _0.75 Cs _0.15 PbI ₃的ZnO PSC实现了高达20.09％的PCE，超过了以前基于ZnO ETL的PSC记录的最高效率。优化的MA_0.1 FA_0.75 Cs_0.15 PbI₃材料在环境条件下1000小时内表现出出色的重现性和长期电池耐久性。特别是，在三阳离子钙钛矿中掺入少量Br，即MA_0.1 FA_0.75 Cs_0.15 PbI_2.9 Br_0.1导致PCE进一步提高高达20.44％，这与性能最佳的MA相当以及含Cs的FA基卤化铅TiO₂ PSC。

更新日期：2018-03-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11