We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
11.4% Efficiency Kesterite Solar Cells on Transparent Electrode.
- Authors
Zhou, Yage; Xiang, Chunxu; Dai, Qi; Xiang, Sitong; Li, Ran; Gong, Yuancai; Zhu, Qiang; Yan, Weibo; Huang, Wei; Xin, Hao
- Abstract
Thin film solar cells on semitransparent substrates are attracting much attention due to new application scenarios including building‐integrated photovoltaics (BIPV). Environmentally‐benign element constituted and highly stable kesterite Cu2ZnSn(S,Se)4 (CZTSSe) thin film solar cells are ideal candidates for such applications. However, the efficiency of kesterite solar cells on semitransparent substrates is far behind that on opaque Mo‐based substrates. Here, fabrication of CZTSSe solar cells on fluorine‐doped tin oxide (FTO) substrates from molecular solution and how step‐by‐step absorber engineering improves device performance is reported. A power conversion efficiency of 7.02% is obtained when the absorber is fabricated on bare FTO, which is improved to 9.56% after adding a MoO3 interfacial layer. Investigations show the enhancement originates from the transformation of MoO3 to MoSe2 during film selenization which initiates crystallization at the back contact and at the same time prevents oversize grains at the absorber surface. Na‐doping and Ag alloying further facilitate grain growth and mitigate band tailing, resulting in a certified effective area efficiency of 11.43% with all device parameters comparable to that on an Mo‐substrate. This is the first time highly efficient kesterite solar cells are demonstrated on transparent electrodes, which opens up new opportunities for these earth‐abundant elements composed of thin film photovoltaics.
- Subjects
SOLAR cell efficiency; PHOTOVOLTAIC power systems; SOLAR cell design; SOLAR cells; COPPER-zinc alloys; THIN films; PHOTOVOLTAIC power generation
- Publication
Advanced Energy Materials, 2023, Vol 13, Issue 19, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202300253