ISRO issue Tender for Procurement of Epitaxial grown wafers for triple junction solar cells – EQ
Summary:
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## 🛰️ **Tender Summary: ISRO/URSC – Epitaxial Grown Wafers for Triple Junction Solar Cells**
### **Issuing Authority**
**Government of India – Department of Space**
**U. R. Rao Satellite Centre (URSC)**, Bangalore
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## 📘 **Tender Overview**
**Tender Title:**
*Epitaxial Grown Wafers for Triple Junction Solar Cells*
**Tender No.:** URSC/CE/IS202500087601
**Tender Date:** 08 October 2025
**Tender Type:** Domestic Public Tender – *Two-Part System*
**Classification:** GOODS
**Purchasing Entity:** CE (Contracts & Procurement Division, URSC)
**Digital Signer:** Ganesh R (signed on 08 Oct 2025, 16:55 IST)
This tender is part of ISRO’s ongoing efforts to **procure high-efficiency epitaxially grown semiconductor wafers** used in **triple-junction solar cells** — critical for powering spacecraft and satellites.
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## 🕐 **Tender Schedule**
| **Milestone** | **Date & Time** |
| ————————- | ——————— |
| **Bid Submission Start** | 08-10-2025, 17:00 hrs |
| **Clarification Due** | 22-10-2025, 16:00 hrs |
| **Bid Submission End** | 29-10-2025, 14:30 hrs |
| **Technical Bid Opening** | 29-10-2025, 15:00 hrs |
| **Price Bid Opening** | 15-12-2025, 11:00 hrs |
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## ⚙️ **Procurement Objective**
ISRO intends to acquire **epitaxially grown wafers** designed for **triple-junction (multi-layer) solar cells**, a technology used for:
* High-efficiency power generation in **satellite and deep-space missions**
* Applications requiring **radiation resistance** and **high power-to-weight ratio**
These wafers typically use **III-V compound semiconductors (e.g., GaAs, Ge, InGaP)** and are fabricated using **MOCVD or MBE** growth methods to achieve efficiencies >30%.
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## 🧾 **Tender Format**
This is a **Two-Part Tender**, comprising:
1. **Technical Bid** – includes material specifications, wafer dimensions, layer properties, doping details, and vendor credentials.
2. **Price Bid** – opened only for technically qualified bidders on 15 December 2025.
Vendors are advised to review the **Detailed Technical Specifications (DTS)** and **General Terms & Conditions (T&C)** provided in the subsequent sections of the tender before submission.
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## 🧮 **Expected Deliverables**
While not specified in these opening pages, based on standard ISRO solar wafer procurements, the tender is expected to require:
* **Epitaxial wafer structures** with **InGaP/GaAs/Ge** triple-junction configuration.
* **Diameter:** typically 100–150 mm (4–6 inch).
* **Epitaxial uniformity:** within ±2%.
* **Doping concentration and thickness:** as per ISRO design requirements.
* **Test certification:** required for crystal quality, minority carrier lifetime, and sheet resistance.
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## 📋 **Compliance Instructions**
* Vendors must submit bids **online only** via ISRO’s e-procurement portal.
* **No physical submissions** accepted.
* The tender follows **standard ISRO procurement protocols** for space-grade materials.
* Bidders must have prior experience in **epitaxial wafer fabrication** or supply to **aerospace/semiconductor R&D organizations**.
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## 🧩 **Significance**
This tender marks ISRO’s continuing focus on **indigenizing high-efficiency space solar cell production**.
By sourcing epitaxial wafers domestically, URSC aims to:
* Reduce dependence on foreign suppliers.
* Strengthen India’s **space-grade semiconductor supply chain**.
* Enhance **in-house satellite power subsystem capabilities**.
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