Highly Efficient Semitransparent Solar Cells with Selective Absorption and Tandem Architecture
Abstract
Semitransparent (ST) photovoltaics (PVs) with selective absorption in the UV or/and near‐infrared (NIR) range(s) and reduced energy losses, are critical for high‐efficiency solar‐window applications. Here, a high‐performance tandem ST‐PV with selected absorption in the desirable regions of the solar spectrum is demonstrated. An ultralarge‐bandgap perovskite film (FAPbBr2.43Cl0.57, Eg ≈ 2.36 eV) is first developed to fulfil efficient selective absorption in the UV region. After optimization, the corresponding ST single junction (SJ) PV exhibits an averaged transmittance (AVT) of ≈68% and an efficiency of ≈7.5%. By sequentially reducing the visible absorbing component in a low‐bandgap organic bulk‐heterojunction layer, an ST‐PV with selective absorption in the NIR is achieved with a power conversion efficiency (PCE) of 5.9% and a high AVT of 62%. The energy loss associated with the SJ ST‐PVs is further reduced with a tandem architecture, which affords a high PCE of 10.7%, an AVT of 52.91%, and a light utilization efficiency up to 5.66%. These results represent the best balance of AVT and PCE among all ST‐PVs reported so far, and this design should pave the road for solar windows of high performance.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 25, 2019
- Source ID
- 10.1002/adma.201901683
Entities
People
- Alex K.‐y. Jen
- Lijian Zuo
- Weifei Fu
- Xueliang Shi
Organizations
- Air Force Office of Scientific Research
- City University of Hong Kong
- National Science Foundation
- Office of Naval Research
- University of Washington