W-doped TiO₂ photoanode for high performance perovskite solar cell

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• 作者：Jinwang Liu ; Jing Zhang ; ^{zhangjing@nbu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Guoqiang Yue ; Xingwei Lu ; Ziyang Hu ; Yuejin Zhu ; ^{zhuyuejin@nbu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Perovskite solar cells ; Photoanode ; W-dopingTiO2 ; The conduction band ; Electron injection
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 March 2016
• 年：2016
• 卷：195
• 期：Complete
• 页码：143-149
• 全文大小：1795 K

文摘

Titanium dioxide (TiO₂) with dispersed W-doping shows its capability for efficient electron collection from perovskite to TiO₂ in perovskite solar cell. The conduction band (CB) of TiO₂ moves downward (positive shift) with increasing the tungsten (W) content, which enlarges the energy gap between the CB of TiO₂ and the perovskite. Thus, the efficiency of electron injection from perovskite to TiO₂ is increased. Due to the increased electron injection, W-doped TiO₂ (≤0.2% W content) enhances the short-circuit photocurrent (J_sc) of perovskite solar cell and improves the performance of perovskite solar cell. Perovskite solar cell with 0.1% W-doped photoanode obtains the highest power conversion efficiency (η = 10.6%), which shows enhancement by 13% in J_sc and by 17% in η, as compared with the undoped TiO₂ perovskite solar cell.