Growth of Zr/N-codoped TiO2 nanorod arrays for enhanced photovoltaic performance of perovskite solar cells
Growth of Zr/N-codoped TiO2 nanorod arrays for enhanced photovoltaic performance of perovskite solar cells
复制标题
DOI：
10.1039/c6ra28669k
复制
发表时间：
2017-02
期刊：
影响因子：
3.9
通讯作者：
Zhenlong Zhang;Jun-Feng Li;Xiaoli Wang;Jian Qin;Wenjia Shi;Yuefeng Liu;Huiping Gao;Y. Mao
中科院分区：
文献类型：
--
作者：
Zhenlong Zhang;Jun-Feng Li;Xiaoli Wang;Jian Qin;Wenjia Shi;Yuefeng Liu;Huiping Gao;Y. Mao
本文采用水热法合成了Zr和N共掺杂TiO2 （Zr/N - TiO2）纳米棒阵列，并以其作为电子传递层制备了钙钛矿太阳能电池。与未掺杂的太阳能电池相比，基于Zr/ N-TiO2的太阳能电池表现出更高的性能。通过改变Zr掺杂量，优化了太阳能电池的性能。Zr掺杂量为1% （Zr/Ti原子比）的Zr/ N-TiO2太阳能电池效率为12.6%，比未掺杂TiO2太阳能电池效率高31.6%。为了深入了解这种增强，我们进行了一些调查。结果表明，Zr/ N-TiO2的开启电压（Voc）增大可能是由于Zr/ N-TiO2的能带隙较小导致导带偏移较大，而短路电流（Isc）增大可能是由于Zr/ N-TiO2的电子转移加快和复合速率降低所致。这些诱导了太阳能电池效率的提高。
In this paper, Zr and N co-doped TiO2 (Zr/N–TiO2) nanorod arrays were synthesized using a hydrothermal method and perovskite solar cells were fabricated using them as an electron transfer layer. The solar cells based on Zr/N–TiO2 presented an enhanced performance compared with those based on un-doped TiO2. The solar cell performance was optimized by changing the Zr doping content. The efficiency of solar cells based on Zr/N–TiO2 with a Zr doping content of 1% (Zr/Ti, atomic ratio) has been achieved at 12.6%, which was 31.6% higher than that of solar cells based on un-doped TiO2. To get an insight into the enhancement, some investigations were carried out. The results indicate that the larger open voltage (Voc) could be due to the larger conduction band offset resulting from the smaller energy band gap for Zr/N–TiO2, and the enlarged short current (Isc) could be attributed to the faster electron transfer and reduced recombination rate for Zr/N–TiO2 NRs. These induce the enhancement of solar cell efficiency.