3 years ago

Incorporating 4-tert-Butylpyridine in an Antisolvent: A Facile Approach to Obtain Highly Efficient and Stable Perovskite Solar Cells

Incorporating
4-tert-Butylpyridine in an Antisolvent: A Facile
Approach to Obtain Highly Efficient and Stable Perovskite Solar Cells
Xi-Hong Ding, Tasawar Hayat, Yong Ding, Ahmed Alsaedi, Pan Xu, Ya-Han Wu, Song-Yuan Dai, Xiao-Qiang Shi, Ying-Ke Ren
The synthesis and growth of CH3NH3PbI3 films with controlled nucleation is a key issue for the high efficiency and stability of solar cells. Here, 4-tert-butylpyridine (tBP) was introduced into a CH3NH3PbI3 antisolvent to obtain high quality perovskite layers. In situ optical microscopy and X-ray diffraction patterns were used to prove that tBP significantly suppressed perovskite nucleation by forming an intermediate phase. In addition, a gradient perovskite structure was obtained by this method, which greatly improved the efficiency and stability of perovskites. An effective power conversion efficiency (PCE) of 17.41% was achieved via the tBP treatment, and the high-efficiency device could maintain over 89% of the initial PCE after 30 days at room temperature.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b16912

DOI: 10.1021/acsami.7b16912

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