Efficient, Semitransparent Neutral-Colored Solar Cells Based on Microstructured Formamidinium Lead Trihalide Perovskite.
Efficient, neutral-colored semitransparent solar cells are of commercial interest for incorporation into the windows and surfaces of buildings and automobiles. Here, we report on semitransparent perovskite solar cells that are both efficient and neutral-colored, even in full working devices. Using the microstructured architecture previously developed, we achieve higher efficiencies by replacing methylammonium lead iodide perovskite with formamidinium lead iodide. Current-voltage hysteresis is also much reduced. Furthermore, we apply a novel transparent cathode to the devices, enabling us to fabricate neutral-colored semitransparent full solar cells for the first time. Such devices demonstrate over 5% power conversion efficiency for average visible transparencies of almost 30%, retaining impressive color-neutrality. This makes these devices the best-performing single-junction neutral-colored semitransparent solar cells to date. These microstructured perovskite solar cells are shown to have a significant advantage over silicon solar cells in terms of performance at high incident angles of sunlight, making them ideal for building integration.
†Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Giles E
GE
Eperon
‡Specific College of Engineering, Baglan Bay Innovation Knowledge Centre, Swansea University, Central Avenue, Baglan SA12 7AX, United Kingdom.
Daniel
D
Bryant
‡Specific College of Engineering, Baglan Bay Innovation Knowledge Centre, Swansea University, Central Avenue, Baglan SA12 7AX, United Kingdom.
Joel
J
Troughton
†Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Samuel D
SD
Stranks
†Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Michael B
MB
Johnston
‡Specific College of Engineering, Baglan Bay Innovation Knowledge Centre, Swansea University, Central Avenue, Baglan SA12 7AX, United Kingdom.
Trystan
T
Watson
‡Specific College of Engineering, Baglan Bay Innovation Knowledge Centre, Swansea University, Central Avenue, Baglan SA12 7AX, United Kingdom.
David A
DA
Worsley
†Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Henry J
HJ
Snaith
building-integrated photovoltaics; neutral color; perovskite; semitransparent; solar cell