TY - JOUR
T1 - Mixed Sn-Ge Perovskite for Enhanced Perovskite Solar Cell Performance in Air
AU - Ito, Nozomi
AU - Kamarudin, Muhammad Akmal
AU - Hirotani, Daisuke
AU - Zhang, Yaohong
AU - Shen, Qing
AU - Ogomi, Yuhei
AU - Iikubo, Satoshi
AU - Minemoto, Takashi
AU - Yoshino, Kenji
AU - Hayase, Shuzi
N1 - Funding Information:
The authors acknowledge JST Mirai Program for financial support.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/4/5
Y1 - 2018/4/5
N2 - Lead-based perovskite solar cells have gained ground in recent years, showing efficiency as high as 20%, which is on par with that of silicon solar cells. However, the toxicity of lead makes it a nonideal candidate for use in solar cells. Alternatively, tin-based perovskites have been proposed because of their nontoxic nature and abundance. Unfortunately, these solar cells suffer from low efficiency and stability. Here, we propose a new type of perovskite material based on mixed tin and germanium. The material showed a band gap around 1.4-1.5 eV as measured from photoacoustic spectroscopy, which is ideal from the perspective of solar cells. In a solar cell device with inverted planar structure, pure tin perovskite solar cell showed a moderate efficiency of 3.31%. With 5% doping of germanium into the perovskite, the efficiency improved up to 4.48% (6.90% after 72 h) when measured in air without encapsulation.
AB - Lead-based perovskite solar cells have gained ground in recent years, showing efficiency as high as 20%, which is on par with that of silicon solar cells. However, the toxicity of lead makes it a nonideal candidate for use in solar cells. Alternatively, tin-based perovskites have been proposed because of their nontoxic nature and abundance. Unfortunately, these solar cells suffer from low efficiency and stability. Here, we propose a new type of perovskite material based on mixed tin and germanium. The material showed a band gap around 1.4-1.5 eV as measured from photoacoustic spectroscopy, which is ideal from the perspective of solar cells. In a solar cell device with inverted planar structure, pure tin perovskite solar cell showed a moderate efficiency of 3.31%. With 5% doping of germanium into the perovskite, the efficiency improved up to 4.48% (6.90% after 72 h) when measured in air without encapsulation.
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U2 - 10.1021/acs.jpclett.8b00275
DO - 10.1021/acs.jpclett.8b00275
M3 - Article
C2 - 29536736
AN - SCOPUS:85045018290
SN - 1948-7185
VL - 9
SP - 1682
EP - 1688
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 7
ER -